Change docs metadata on projects-related pages to Manage: Workspace

doc/public_access/public_access.md

 ---
-stage: none
-group: unassigned
+stage: Manage
+group: Workspace
 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
 type: reference
 ---

doc/user/project/index.md

 ---
-stage: Create
-group: Source Code
+stage: Manage
+group: Workspace
 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"
 type: reference
 ---

doc/user/project/members/share_project_with_groups.md

 ---
-stage: none
-group: unassigned
+stage: Manage
+group: Workspace
 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
 ---
 

doc/user/project/settings/index.md

 ---
-stage: Create
-group: Source Code
+stage: Manage
+group: Workspace
 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"
 type: reference, index, howto
 ---

doc/user/project/working_with_projects.md

 ---
-stage: Create
-group: Source Code
+stage: Manage
+group: Workspace
 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"
 ---
 

doc/user/reserved_names.md

 ---
-stage: none
-group: unassigned
+stage: Manage
+group: Workspace
 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
 ---