Bump ical to 4.2.4

[allenporter]

Proposed change

Bump ical to 4.2.4 to fix parsing errors due to incorrect reliance on unspecified behavior in typing.get_args

Release notes: https://github.com/allenporter/ical/releases/tag/4.2.4
Changelog: allenporter/ical@4.2.3...4.2.4

Type of change

• Dependency upgrade
• Bugfix (non-breaking change which fixes an issue)
• New integration (thank you!)
• New feature (which adds functionality to an existing integration)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Additional information

• This PR fixes or closes issue: fixes Local calendar: another start/end validation error #84171
• This PR is related to issue: Cannot add a new entry to Local Calendar #83401
• Link to documentation pull request:

Checklist

• The code change is tested and works locally.
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