Bump version for v0.15.0 release #62

Job	Run time
Run test and build (macos-15-intel)	2m 19s
Run test and build (ubuntu-24.04-arm)	33s
Run test and build (ubuntu-latest)	39s
Run test and build (macos-14)	1m 22s
Run test and build (macos-15)	1m 36s
	6m 29s

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