Restores previous versions of gRPC and protobuf to preserve backward … #772

Job	Run time
checkstyle	1m 17s
copyright	1m 19s
build	1m 18s
shellcheck	1m 18s
tests/native-image-${{ matrix.module }}-${{ matrix.platform }}	1s
spotbugs/${{ matrix.moduleSet }}	1s
tests/${{ matrix.moduleSet }}	1s
tests/tck-${{ matrix.moduleSet }}	1s
docs	1s
archetypes/${{ matrix.group }}-${{ matrix.packaging }}	1s
javadoc	1s
examples/${{ matrix.platform }}	1s
archetypes/legacy	1s
tests/packaging-${{ matrix.packaging }}-${{ matrix.platform }}	1s
quickstarts/${{ matrix.platform }}	1s
tests/results	1s
gate	1s
	5m 25s

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