Fix missing link to Git LFS documentation in File management section

The File management section mentions git lfs but doesn't link to the detailed Git LFS documentation.

Location https://docs.gitlab.com/ee/topics/git/advanced.html

Current Text "git lfs: Manage, track, and lock files in your repository."

Suggested Fix "git lfs: Manage, track, and lock files in your repository. Learn more about Git LFS"

Why This Helps Users can easily find more detailed information about Git LFS.

quick win documentation Documentation typedocumentation