Merge branch 'fix/fork-spec-mysql' into 'master'

Fix fork_spec failure to do with mySQL

Closes #31870

See merge request !11121

lib/gitlab/import_export/import_export.yml

@@ -84,6 +84,8 @@ excluded_attributes:
     - :import_jid
     - :id
     - :star_count
+    - :last_repository_updated_at
+    - :last_repository_check_at
   snippets:
     - :expired_at
   merge_request_diff:
@@ -113,4 +115,4 @@ methods:
   merge_requests:
     - :diff_head_sha
   project:
-    - :description_html
\ No newline at end of file
+    - :description_html