Adds a few fixes for clang and startup errors.

What's Changed

• Update actions by @rettinghaus in #1554
• Fix clang build by @heinezen in #1560
• Make asset location cache file write more robust by @heinezen in #1561
• Always handle asset path as UnionPath by @heinezen in #1563
• Add missing asset directories to CMakeLists by @heinezen in #1565
• Changelog release 0.5.1 by @heinezen in #1567

New Contributors

• @rettinghaus made their first contribution in #1554

Full Changelog: v0.5.0...v0.5.1