mattermost 8.1.10 -> 9.5.1 https://repology.org/project/mattermost/versions
attrpath: mattermost
Checking auto update branch...
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There might already be an open PR for this update:
- mattermost 8.1.10 → 9.5.1
  URL "https://api.github.com/repos/NixOS/nixpkgs/issues/291409"