Bump version for v1.15.52 release #275

Job	Run time
Run test and build (macos-14)	1m 17s
Run test and build (ubuntu-24.04-arm)	49s
Run test and build (macos-15-intel)	3m 16s
Run test and build (macos-15)	1m 16s
Run test and build (ubuntu-latest)	39s
	7m 17s

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