Merge commit '9b0050e9aabe4be65c78ccf292a348f309d50ccd' as 'docs'

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

Closes #11925

docs/content/en/functions/crypto/SHA1.md

@@ -0,0 +1,20 @@
+---
+title: crypto.SHA1
+description: Hashes the given input and returns its SHA1 checksum encoded to a hexadecimal string.
+categories: []
+keywords: []
+action:
+  aliases: [sha1]
+  related:
+    - functions/crypto/FNV32a
+    - functions/crypto/HMAC
+    - functions/crypto/MD5
+    - functions/crypto/SHA256
+  returnType: string
+  signatures: [crypto.SHA1 INPUT]
+aliases: [/functions/sha,/functions/sha1]
+---
+
+```go-html-template
+{{ sha1 "Hello world" }} → 7b502c3a1f48c8609ae212cdfb639dee39673f5e
+```