fix: TypeError for routes when translateURIDashes is enabled

[maniaba]

Description This pull request addresses a TypeError that occurs in CodeIgniter 4 when the translateURIDashes property is set to true in the Routes.php configuration file and an OPTIONS route is defined using a closure. The error message indicates that the str_replace() function receives a Closure instead of the expected string or array.

Related Issue: Fixes #9208

Checklist:

• [x] Securely signed commits
• [ ] Component(s) with PHPDoc blocks, only if necessary or adds value
• [ ] Unit testing, with >80% coverage
• [x] User guide updated
• [x] Conforms to style guide

[michalsn]

Can you add a test?

[michalsn]

@maniaba Sorry, I forgot about it earlier, but a changelog entry would be nice too 😅 https://github.com/codeigniter4/CodeIgniter4/blob/develop/user_guide_src/source/changelogs/v4.5.6.rst