Merge branch 'slashmanov/add-toggle-file-browser-shortcut-to-docs' into 'master'

Add Toggle File Browser shortcut to docs

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/130497



Merged-by: Amy Qualls <aqualls@gitlab.com>
Approved-by: Amy Qualls <aqualls@gitlab.com>
Co-authored-by: Stanislav Lashmanov <slashmanov@gitlab.com>