Add recommendation to use latest for DS

doc/user/application_security/dependency_scanning/index.md

@@ -922,6 +922,8 @@ gemnasium-dependency_scanning:
 
 ## Warnings
 
+We recommend that you use the most recent version of all containers, and the most recent supported version of all package managers and languages. Using previous versions carries an increased security risk because unsupported versions may no longer benefit from active security reporting and backporting of security fixes.
+
 ### Python projects
 
 Extra care needs to be taken when using the [`PIP_EXTRA_INDEX_URL`](https://pipenv.pypa.io/en/latest/cli/#envvar-PIP_EXTRA_INDEX_URL)