Bump unf_ext from 0.0.7.5 to 0.0.7.6

Bumps [unf_ext](https://github.com/knu/ruby-unf_ext) from 0.0.7.5 to 0.0.7.6.
- [Release notes](https://github.com/knu/ruby-unf_ext/releases)
- [Changelog](https://github.com/knu/ruby-unf_ext/blob/master/CHANGELOG.md)
- [Commits](knu/ruby-unf_ext@v0.0.7.5...v0.0.7.6)

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

Gemfile.lock

@@ -104,7 +104,7 @@ GEM
     tins (1.20.2)
     unf (0.1.4)
       unf_ext
-    unf_ext (0.0.7.5)
+    unf_ext (0.0.7.6)
     unicode-display_width (1.5.0)
 
 PLATFORMS