Fix CI errors

[zll600]

Target branch:
Resolves issue

Fix following failed jobs

• Bump actions/checkout from 4 to 5 #730: https://github.com/web-auth/webauthn-framework/actions/runs/17371363532/job/49307726947?pr=730
• Update infection/infection requirement from ^0.29 to ^0.29 || ^0.31 #727: https://github.com/web-auth/webauthn-framework/actions/runs/16666575073/job/47174080242?pr=727
• Bump ossf/scorecard-action from 2.4.2 to 2.4.3 #734: https://github.com/web-auth/webauthn-framework/actions/runs/18150927808/job/51661697386?pr=734

• It is a Bug fix
• It is a New feature
• Breaks BC
• Includes Deprecations

[zll600]

Close by #736

[Spomky]

Many thanks for the proposal.
The CI/CD is generally not critical for the latest branch, except right before a release.
However, in this specific branch 5.3, I decided to completely review the CI/CD and create a comprehensive workflow separated into simple steps.