Add v5.1.1 docs (#34870)

docs/5.1/utilities/background/index.html

@@ -5,7 +5,7 @@
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <meta name="description" content="Convey meaning through background-color and add decoration with gradients.">
 <meta name="author" content="Mark Otto, Jacob Thornton, and Bootstrap contributors">
-<meta name="generator" content="Hugo 0.87.0">
+<meta name="generator" content="Hugo 0.88.1">
 
 <meta name="docsearch:language" content="en">
 <meta name="docsearch:version" content="5.1">
@@ -17,7 +17,7 @@
 
 
 <!-- Bootstrap core CSS -->
-<link href="/docs/5.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-KyZXEAg3QhqLMpG8r+8fhAXLRk2vvoC2f3B09zVXn8CA5QIVfZOJ3BCsw2P0p/We" crossorigin="anonymous">
+<link href="/docs/5.1/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-F3w7mX95PdgyTmZZMECAngseQB83DfGTowi0iMjiWaeVhAn4FJkqJByhZMI3AhiU" crossorigin="anonymous">
 
 <link href="/docs/5.1/assets/css/docs.css" rel="stylesheet">
 
@@ -149,7 +149,7 @@
     <span class="d-none d-lg-inline">Bootstrap</span> v5.1
   </button>
   <ul class="dropdown-menu dropdown-menu-end" aria-labelledby="bd-versions">
-    <li><a class="dropdown-item current" aria-current="true" href="/docs/5.1/">Latest (5.0.x)</a></li>
+    <li><a class="dropdown-item current" aria-current="true" href="/docs/5.1/">Latest (5.1.x)</a></li>
     <li><hr class="dropdown-divider"></li>
     <li><a class="dropdown-item" href="https://getbootstrap.com/docs/4.6/">v4.6.x</a></li>
     <li><a class="dropdown-item" href="https://getbootstrap.com/docs/3.4/">v3.4.1</a></li>
@@ -563,7 +563,15 @@
 <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-scss" data-lang="scss"><span class="nv">$theme-colors-rgb</span><span class="o">:</span> <span class="nf">map-loop</span><span class="p">(</span><span class="nv">$theme-colors</span><span class="o">,</span> <span class="n">to-rgb</span><span class="o">,</span> <span class="s2">&#34;$value&#34;</span><span class="p">);</span>
 </code></pre></div>
 <p>And background color opacities build on that with their own map that&rsquo;s consumed by the utilities API:</p>
-<div class="highlight"><pre tabindex="0" class="chroma"><code class="language-scss" data-lang="scss"><span class="nv">$utilities-bg-colors</span><span class="o">:</span> <span class="nf">map-loop</span><span class="p">(</span><span class="nv">$utilities-colors</span><span class="o">,</span> <span class="n">rgba-css-var</span><span class="o">,</span> <span class="s2">&#34;$key&#34;</span><span class="o">,</span> <span class="s2">&#34;bg&#34;</span><span class="p">);</span>
+<div class="highlight"><pre tabindex="0" class="chroma"><code class="language-scss" data-lang="scss"><span class="nv">$utilities-bg</span><span class="o">:</span> <span class="nf">map-merge</span><span class="p">(</span>
+  <span class="nv">$utilities-colors</span><span class="o">,</span>
+  <span class="p">(</span>
+    <span class="s2">&#34;black&#34;</span><span class="o">:</span> <span class="nf">to-rgb</span><span class="p">(</span><span class="nv">$black</span><span class="p">)</span><span class="o">,</span>
+    <span class="s2">&#34;white&#34;</span><span class="o">:</span> <span class="nf">to-rgb</span><span class="p">(</span><span class="nv">$white</span><span class="p">)</span><span class="o">,</span>
+    <span class="s2">&#34;body&#34;</span><span class="o">:</span> <span class="nf">to-rgb</span><span class="p">(</span><span class="nv">$body-bg</span><span class="p">)</span>
+  <span class="p">)</span>
+<span class="p">);</span>
+<span class="nv">$utilities-bg-colors</span><span class="o">:</span> <span class="nf">map-loop</span><span class="p">(</span><span class="nv">$utilities-bg</span><span class="o">,</span> <span class="n">rgba-css-var</span><span class="o">,</span> <span class="s2">&#34;$key&#34;</span><span class="o">,</span> <span class="s2">&#34;bg&#34;</span><span class="p">);</span>
 </code></pre></div>
 <h3 id="mixins">Mixins</h3>
 <p><strong>No mixins are used to generate our background utilities</strong>, but we do have some additional mixins for other situations where you&rsquo;d like to create your own gradients.</p>
@@ -653,7 +661,7 @@
         <ul class="list-unstyled small text-muted">
           <li class="mb-2">Designed and built with all the love in the world by the <a href="/docs/5.1/about/team/">Bootstrap team</a> with the help of <a href="https://github.com/twbs/bootstrap/graphs/contributors">our contributors</a>.</li>
           <li class="mb-2">Code licensed <a href="https://github.com/twbs/bootstrap/blob/main/LICENSE" target="_blank" rel="license noopener">MIT</a>, docs <a href="https://creativecommons.org/licenses/by/3.0/" target="_blank" rel="license noopener">CC BY 3.0</a>.</li>
-          <li class="mb-2">Currently v5.1.0.</li>
+          <li class="mb-2">Currently v5.1.1.</li>
         </ul>
       </div>
       <div class="col-6 col-lg-2 offset-lg-1 mb-3">
@@ -700,7 +708,7 @@
   </div>
 </footer>
 
-    <script src="/docs/5.1/dist/js/bootstrap.bundle.min.js" integrity="sha384-U1DAWAznBHeqEIlVSCgzq+c9gqGAJn5c/t99JyeKa9xxaYpSvHU5awsuZVVFIhvj" crossorigin="anonymous"></script>
+    <script src="/docs/5.1/dist/js/bootstrap.bundle.min.js" integrity="sha384-/bQdsTh/da6pkI1MST/rWKFNjaCP5gBSY4sEBT38Q/9RBh9AH40zEOg7Hlq2THRZ" crossorigin="anonymous"></script>
 
 
 <script src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script>