Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

```
git subtree add --prefix=docs/ https://github.com/gohugoio/hugoDocs.git master --squash
```

Closes #11925

docs/content/en/functions/collections/Shuffle.md

@@ -0,0 +1,22 @@
+---
+title: collections.Shuffle
+description: Returns a random permutation of a given array or slice.
+categories: []
+keywords: []
+action:
+  aliases: [shuffle]
+  related:
+    - functions/collections/Reverse
+    - functions/collections/Sort
+    - functions/collections/Uniq
+  returnType: any
+  signatures: [collections.Shuffle COLLECTION]
+aliases: [/functions/shuffle]
+---
+
+```go-html-template
+{{ shuffle (seq 1 2 3) }} → [3 1 2] 
+{{ shuffle (slice "a" "b" "c") }} → [b a c] 
+```
+
+The result will vary from one build to the next.