gitea: Update to 1.9.1
Changes:
* BREAKING
* Add pagination for admin api get orgs and fix only list public orgs bug (#7742) (#7752)
* SECURITY
* Be more strict with git arguments (#7715) (#7762)
* Release built with go 1.12.8 to fix security fixes in golang std lib, ref: https://groups.google.com/forum/#!topic/golang-nuts/fCQWxqxP8aA
* BUGFIXES
* Fix local runs of ssh-requiring integration tests (#7855) (#7857)
* Fix hook problem (#7856) (#7754)
* Use .ExpiredUnix.IsZero to display green color of forever valid gpg key (#7850) (#7846)
* Do not fetch all refs (#7797) (#7837)
* Fix duplicate call of webhook (#7824) (#7821)
* Enable switching to a different source branch when PR already exists (#7823)
* Rewrite existing repo units if setting is not included in api body (#7811)
* Prevent Commit Status and Message From Overflowing On Branch Page (#7800) (#7808)
* API: fix multiple bugs with statuses endpoints (Backport #7785) (#7807)
* Fix Slack webhook fork message (1.9 release backport) (#7783)
* Fix approvals counting (#7757) (#7777)
* Fix rename failed when rewrite public keys (#7761) (#7769)
* Fix dropTableColumns sqlite implementation (#7710) (#7765)
* Fix repo_index_status lingering when deleting a repository (#7738)
* Fix milestone completness calculation when migrating (#7725) (#7732)
* Fixes indexed repos keeping outdated indexes when files grow too large (#7731)
* Skip non-regular files (e.g. submodules) on repo indexing (#7717)
* Improve branches list performance and fix protected branch icon when no-login (#7695) (#7704)
* Correct wrong datetime format for git (#7689) (#7690)
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