Document auto language detection

doc/user/application_security/sast/index.md

@@ -59,7 +59,9 @@ is **not** `19.03.0`. See [troubleshooting information](#error-response-from-dae
 
 ## Supported languages and frameworks
 
-The following table shows which languages, package managers and frameworks are supported and which tools are used.
+GitLab SAST supports a variety of languages, package managers, and frameworks. Our SAST security scanners also feature automatic language detection which works even for mixed-language projects. If any supported language is detected in project source code we will automatically run the appropriate SAST analyzers.
+
+You can also [view our language roadmap](https://about.gitlab.com/direction/secure/static-analysis/sast/#language-support) and [request other language support by opening an issue](https://gitlab.com/groups/gitlab-org/-/epics/297). 
 
 | Language (package managers) / framework                                                                                                          | Scan tool                                                                                                     | Introduced in GitLab Version                                                                                                                                          |
 |--------------------------------------------------------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------|