Various unrelated fixes to kimai update script

[jamezpolley]

Fixes aren't related but have been merged into #4548 as per directions from project owners, sorry.

✍️ Description

Various unrelated fixes

🔗 Related PR / Issue

Link: #4548 and #4247 and #4550

✅ Prerequisites (X in brackets)

• Self-review completed – Code follows project standards.
• Tested thoroughly – Changes work as expected.
• No security risks – No hardcoded secrets, unnecessary privilege escalations, or permission issues.

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🛠️ Type of Change (X in brackets)

• 🐞 Bug fix – Resolves an issue without breaking functionality.
• ✨ New feature – Adds new, non-breaking functionality.
• 💥 Breaking change – Alters existing functionality in a way that may require updates.
• 🆕 New script – A fully functional and tested script or script set.
• 🌍 Website update – Changes to website-related JSON files or metadata.
• 🔧 Refactoring / Code Cleanup – Improves readability or maintainability without changing functionality.
• 📝 Documentation update – Changes to README, AppName.md, CONTRIBUTING.md, or other docs.

[jamezpolley]

I can think of a few other ways to do the test, this was just the first thing I thought of. Not sure if there's a standard way to do this.

[jamezpolley]

I was finally able to get the new version of kimai working - but only after manually undoing and redoing various steps of this upgrade. In particular, the finall step (reinstall php-fpm) was done by hand after everything else had run.

So I can't say that I've tested this script as thoroughly as I would like.

[tremor021]

LGTM