v1.21.1

* SECURITY
  * Fix comment permissions (#28213) (#28216)
* BUGFIXES
  * Fix delete-orphaned-repos (#28200) (#28202)
  * Make CORS work for oauth2 handlers (#28184) (#28185)
  * Fix missing buttons (#28179) (#28181)
  * Fix no ActionTaskOutput table waring (#28149) (#28152)
  * Fix empty action run title (#28113) (#28148)
  * Use "is-loading" to avoid duplicate form submit for code comment (#28143) (#28147)
  * Fix Matrix and MSTeams nil dereference (#28089) (#28105)
  * Fix incorrect pgsql conn builder behavior (#28085) (#28098)
  * Fix system config cache expiration timing (#28072) (#28090)
  * Restricted users only see repos in orgs which their team was assigned to (#28025) (#28051)
* API
  * Fix permissions for Token DELETE endpoint to match GET and POST (#27610) (#28099)
* ENHANCEMENTS
  * Do not display search box when there's no packages yet (#28146) (#28159)
  * Add missing `packages.cleanup.success` (#28129) (#28132)
* DOCS
  * Docs: Replace deprecated IS_TLS_ENABLED mailer setting in email setup (#28205) (#28208)
  * Fix the description about the default setting for action in quick start document (#28160) (#28168)
  * Add guide page to actions when there's no workflows (#28145) (#28153)
* MISC
  * Use full width for PR comparison (#28182) (#28186)
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