Bump diffy from 3.2.0 to 3.4.1

Bumps [diffy](https://github.com/samg/diffy) from 3.2.0 to 3.4.1.
- [Release notes](https://github.com/samg/diffy/releases)
- [Changelog](https://github.com/samg/diffy/blob/main/CHANGELOG)
- [Commits](https://github.com/samg/diffy/commits)

---
updated-dependencies:
- dependency-name: diffy
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -3,7 +3,7 @@ GEM
   specs:
     coderay (1.1.1)
     diff-lcs (1.2.5)
-    diffy (3.2.0)
+    diffy (3.4.1)
     method_source (0.8.2)
     parallel (1.12.1)
     parallel_tests (2.21.2)