Bump zeitwerk from 2.6.7 to 2.6.8 (#390)

Bumps [zeitwerk](https://github.com/fxn/zeitwerk) from 2.6.7 to 2.6.8.
- [Release notes](https://github.com/fxn/zeitwerk/releases)
- [Changelog](https://github.com/fxn/zeitwerk/blob/main/CHANGELOG.md)
- [Commits](fxn/zeitwerk@v2.6.7...v2.6.8)

---
updated-dependencies:
- dependency-name: zeitwerk
  dependency-type: indirect
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

gems.locked

@@ -75,7 +75,7 @@ GEM
       zeitwerk (~> 2.6)
     unicode-display_width (2.4.2)
     yard (0.9.34)
-    zeitwerk (2.6.7)
+    zeitwerk (2.6.8)
 
 PLATFORMS
   ruby