Merge branch '442145-docs-fix-capitalization' into 'master'

Fix metrics capitalization

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145688



Merged-by: Phillip Wells <pwells@gitlab.com>
Approved-by: Phillip Wells <pwells@gitlab.com>
Co-authored-by: Lorena Ciutacu <lciutacu@gitlab.com>