Bump mocha from 2.6.0 to 2.6.1

Bumps [mocha](https://github.com/freerange/mocha) from 2.6.0 to 2.6.1.
- [Changelog](https://github.com/freerange/mocha/blob/main/RELEASE.md)
- [Commits](freerange/mocha@v2.6.0...v2.6.1)

---
updated-dependencies:
- dependency-name: mocha
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Gemfile.lock

@@ -177,7 +177,7 @@ GEM
       libv8-node (~> 21.7.2.0)
     minitest (5.25.1)
     minitest-stub-const (0.6)
-    mocha (2.6.0)
+    mocha (2.6.1)
       ruby2_keywords (>= 0.0.5)
     mysql2 (0.5.6)
     net-imap (0.4.17)