ci: use pull_request for security

[yejseo01]

@awphi pointed out using pull_request_target can cause some security complications so changing it.

Changes

• use pull_request rather than pull_request_target

Checklist

• 🤖 This change is covered by tests as required.
• 🤹 All required manual testing has been performed.
• 📖 All documentation updates are complete.

[awphi]

https://github.com/amannn/action-semantic-pull-request?tab=readme-ov-file#event-triggers

Was writing a comment about these docs ^ but saw it's outdated amannn/action-semantic-pull-request#219 - lgtm!

[federicobozzini]

@yejseo01 I think the commit category is wrong here. This is not a fix, it should be CI or a CI fix.

done