Bump bundler from 4.0.8 to 4.0.13

Bumps [bundler](https://github.com/ruby/rubygems/tree/master/bundler) from 4.0.8 to 4.0.13.
- [Release notes](https://github.com/ruby/rubygems/releases/tag/bundler-v4.0.14)
- [Changelog](https://github.com/ruby/rubygems/blob/4630c505cb9682f27e58710e220cb895e28b0c54/bundler/CHANGELOG.md)
- [Commits](ruby/rubygems@bundler-v4.0.8...bundler-v4.0.14)

This also lets us workaround a bug in Dependabot that was corrupting our
Bundler lockfiles (see
dependabot/dependabot-core#15193 (comment)).

Author: lfdebrux

Gemfile.lock

@@ -1150,4 +1150,4 @@ RUBY VERSION
   ruby 3.4.8p72
 
 BUNDLED WITH
-  4.0.8
+  4.0.13