chore: Post-release version bump to 0.5.0-rc #327

Job	Run time
Test (beta)	28s
Cross Platform Build (macos-latest)	1m 0s
Test (stable)	40s
Security Audit	14s
Code Coverage	1m 42s
Cross Platform Build (ubuntu-latest)	54s
Test (nightly)	34s
	5m 32s

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