Bump puma from 3.12.0 to 3.12.1 (mastodon#10331)

Bumps [puma](https://github.com/puma/puma) from 3.12.0 to 3.12.1.
- [Release notes](https://github.com/puma/puma/releases)
- [Changelog](https://github.com/puma/puma/blob/master/History.md)
- [Commits](puma/puma@v3.12.0...v3.12.1)

Signed-off-by: dependabot[bot] <support@dependabot.com>

Author: dependabot[bot]

Gemfile.lock

@@ -420,7 +420,7 @@ GEM
       pry (>= 0.10.4)
     psych (3.1.0)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (3.12.1)
     pundit (2.0.1)
       activesupport (>= 3.0.0)
     raabro (1.1.6)