Merge branch 'docs-solargraph-group-fix' into 'master'

Update metadata group name for Development page

See merge request gitlab-org/gitlab!60136

doc/development/developing_with_solargraph.md

 ---
 stage: Create
-group: Source code
+group: Source Code
 info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments
 ---