Build release artifacts

Add iOS XCframework build to release artefacts. #384

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Run time

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Job	Run time
verify-input	13s
build-source	1m 8s
build-android (x86_64)	10s
build-docs	5m 49s
build-android (aarch64)	10s
build-iOS	0s
test-source	9m 45s
test-docs	30s
	17m 45s