Backport: NuGet Changes

Update authors and copyright to match npm, add repository reference. Also incorporates licensing expression change by @vanillajonathan (#37378)

Co-authored-by: Jesse Mandel <jesse.mandel@jdpa.com>

nuget/bootstrap.sass.nuspec

@@ -5,16 +5,17 @@
     <!-- pulled from package.json -->
     <version>4</version>
     <title>Bootstrap Sass</title>
-    <authors>The Bootstrap Authors, Twitter Inc.</authors>
+    <authors>The Bootstrap Authors</authors>
     <owners>bootstrap</owners>
     <description>The most popular front-end framework for developing responsive, mobile first projects on the web.</description>
     <releaseNotes>https://blog.getbootstrap.com/</releaseNotes>
     <summary>Bootstrap framework in Sass. Includes JavaScript</summary>
     <language>en-us</language>
     <projectUrl>https://getbootstrap.com/</projectUrl>
+    <repository type="git" url="https://github.com/twbs/bootstrap.git" branch="v4-dev" />
     <icon>bootstrap.png</icon>
-    <license type="file">LICENSE.txt</license>
-    <copyright>Copyright 2017-2022</copyright>
+    <license type="expression">MIT</license>
+    <copyright>Copyright 2011-2022</copyright>
     <requireLicenseAcceptance>false</requireLicenseAcceptance>
     <dependencies>
       <dependency id="jQuery" version="[3.0.0,4)" />
@@ -26,7 +27,6 @@
     </contentFiles>
   </metadata>
   <files>
-    <file src="LICENSE.txt" target="" />
     <file src="nuget\bootstrap.png" target="" />
 
     <file src="scss\**\*.scss" target="content\Content\bootstrap" />