Merge branch '229473-doc-dependency-path-for-yarn1' into 'master'

Document dependency path for Yarn 1.x

See merge request gitlab-org/gitlab!47931

doc/user/application_security/dependency_list/index.md

@@ -55,6 +55,7 @@ dependencies, but the UI only shows one of the shortest paths.
 Dependency Paths are supported for the following package managers:
 
 - [NuGet](https://www.nuget.org/)
+- [Yarn 1.x](https://classic.yarnpkg.com/lang/en/)
 
 ## Licenses