Add missing properties to GHAsset and GHRelease #4664

Job	Run time
build-only (Java 17)	48s
site (Java 17)	1m 13s
test (ubuntu, Java 17)	12m 20s
build-and-test Bridged (Java 17)	12m 42s
test Java 11 (no-build)	56s
test (ubuntu, Java 21)	12m 16s
test (windows, Java 17)	9m 35s
test (windows, Java 21)	9m 15s
codecov-upload (Upload to codecov.io)	11s
	59m 16s

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