Add migration to fix external unit access mode of owner/admin team#24117

6543 merged 2 commits intogo-gitea:maingo-gitea/gitea:mainfrom

yp05327:fix-enternal-unit-accessmode-in-owner-and-admin-teamyp05327/gitea:fix-enternal-unit-accessmode-in-owner-and-admin-teamCopy head branch name to clipboard