Merge branch 'docs-add-sast-nodejs' into 'master'

Add Node.js to the languages supported by SAST

Closes #5652

See merge request gitlab-org/gitlab-ee!6301

doc/user/project/merge_requests/sast.md

@@ -35,6 +35,7 @@ The following languages and frameworks are supported.
 | Go (experimental)     | [Go AST Scanner](https://github.com/GoASTScanner/gas)                                  |
 | PHP                   | [phpcs-security-audit](https://github.com/FloeDesignTechnologies/phpcs-security-audit) |
 | .NET                  | [Security Code Scan](https://security-code-scan.github.io)                             |
+| Node.js               | [NodeJsScan](https://github.com/ajinabraham/NodeJsScan)                                |
 
 ## How it works