Bump the rails_70 group in /gemfiles/rails_70 with 1 update

Bumps the rails_70 group in /gemfiles/rails_70 with 1 update: [minitest](https://github.com/minitest/minitest).


Updates `minitest` from 5.22.2 to 5.22.3
- [Changelog](https://github.com/minitest/minitest/blob/master/History.rdoc)
- [Commits](minitest/minitest@v5.22.2...v5.22.3)

---
updated-dependencies:
- dependency-name: minitest
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: rails_70
...

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

gemfiles/rails_70/Gemfile.lock

@@ -102,7 +102,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.5)
-    minitest (5.22.2)
+    minitest (5.22.3)
     minitest-reporters (1.6.1)
       ansi
       builder