chore(deps): bump concurrent-ruby in /fluent-plugin-enhance-k8s-metadata

Bumps [concurrent-ruby](https://github.com/ruby-concurrency/concurrent-ruby) from 1.3.3 to 1.3.4.
- [Release notes](https://github.com/ruby-concurrency/concurrent-ruby/releases)
- [Changelog](https://github.com/ruby-concurrency/concurrent-ruby/blob/master/CHANGELOG.md)
- [Commits](ruby-concurrency/concurrent-ruby@v1.3.3...v1.3.4)

---
updated-dependencies:
- dependency-name: concurrent-ruby
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

fluent-plugin-enhance-k8s-metadata/Gemfile.lock

@@ -24,7 +24,7 @@ GEM
     addressable (2.8.6)
       public_suffix (>= 2.0.2, < 6.0)
     bigdecimal (3.1.8)
-    concurrent-ruby (1.3.3)
+    concurrent-ruby (1.3.4)
     connection_pool (2.4.0)
     cool.io (1.7.1)
     crack (1.0.0)