Bump mini_magick from 4.12.0 to 4.13.1

Bumps [mini_magick](https://github.com/minimagick/minimagick) from 4.12.0 to 4.13.1.
- [Release notes](https://github.com/minimagick/minimagick/releases)
- [Commits](minimagick/minimagick@v4.12.0...v4.13.1)

---
updated-dependencies:
- dependency-name: mini_magick
  dependency-type: indirect
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile.lock

@@ -426,7 +426,7 @@ GEM
     mime-types (3.5.2)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2024.0604)
-    mini_magick (4.12.0)
+    mini_magick (4.13.1)
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
     minitest (5.23.1)