Update zeitwerk requirement from >= 2.6.0, < 2.6.12 to >= 2.6.0, < 2.…

…6.13

Updates the requirements on [zeitwerk](https://github.com/fxn/zeitwerk) to permit the latest version.
- [Changelog](https://github.com/fxn/zeitwerk/blob/main/CHANGELOG.md)
- [Commits](fxn/zeitwerk@v2.6.0...v2.6.12)

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

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

freight_kit.gemspec

@@ -47,7 +47,7 @@ Gem::Specification.new do |spec|
   spec.add_dependency('savon', '>= 2.0', '< 2.15')
   spec.add_dependency('tzinfo-data', '~> 1.2023', '>= 1.2023.3')
   spec.add_dependency('watir', '>= 7.0', '< 7.2')
-  spec.add_dependency('zeitwerk', '>= 2.6.0', '< 2.6.12')
+  spec.add_dependency('zeitwerk', '>= 2.6.0', '< 2.6.13')
 
   spec.required_ruby_version = '>= 3.2.0'
 end