Log Message:
gitea: Update to 1.9.2.

* BUGFIXES
  * Fix wrong sender when send slack webhook (#7918) (#7924)
  * Upload support text/plain; charset=utf8 (#7899)
  * Lfs/lock: round locked_at timestamp to second (#7872) (#7875)
  * Fix non existent milestone with 500 error (#7867) (#7873)
* SECURITY
  * Fix No PGP signature on 1.9.1 tag (#7874)
  * Release built with go 1.12.9 to fix security fixes in golang std lib, ref: \ 
https://groups.google.com/forum/#!msg/golang-announce/oeMaeUnkvVE/a49yvTLqAAAJ
* ENHANCEMENT
  * Fix pull creation with empty changes (#7920) (#7926)
* BUILD
  * Drone/docker: prepare multi-arch release + provide arm64 image (#7571) (#7884)