[24.0] Update PR title handling for changing base ref

[arash77]

Enhance the workflow to update the title of pull requests when the base reference changes by improving efficiency in title formatting and version extraction.
Following up #19183

How to test the changes?

(Select all options that apply)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.

[nsoranzo]

LGTM, thanks!