Update overcommit requirement from 0.67.1 to 0.68.0 (#579)

Updates the requirements on [overcommit](https://github.com/sds/overcommit) to permit the latest version.
- [Release notes](https://github.com/sds/overcommit/releases)
- [Changelog](https://github.com/sds/overcommit/blob/main/CHANGELOG.md)
- [Commits](sds/overcommit@v0.67.1...v0.68.0)

---
updated-dependencies:
- dependency-name: overcommit
  dependency-version: 0.68.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile

@@ -12,7 +12,7 @@ gem 'rspec-its', '~> 2.0'
 gem 'appraisal'
 
 # Run all pre-commit hooks via Overcommit during CI runs
-gem 'overcommit', '0.67.1'
+gem 'overcommit', '0.68.0'
 
 # Pin tool versions (which are executed by Overcommit) for CI builds
 gem 'rubocop', '1.77.0'