Bump unicode-display_width from 2.5.0 to 2.6.0 in /.overcommit

Bumps [unicode-display_width](https://github.com/janlelis/unicode-display_width) from 2.5.0 to 2.6.0.
- [Changelog](https://github.com/janlelis/unicode-display_width/blob/main/CHANGELOG.md)
- [Commits](janlelis/unicode-display_width@v2.5.0...v2.6.0)

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

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

.overcommit/Gemfile.lock

@@ -49,7 +49,7 @@ GEM
     rubocop-rspec (3.0.3)
       rubocop (~> 1.61)
     ruby-progressbar (1.13.0)
-    unicode-display_width (2.5.0)
+    unicode-display_width (2.6.0)
 
 PLATFORMS
   ruby