GHA: Disable docs building #109

Job	Run time
Select platforms	3s
linux-x64-hs-nopch	0s
linux-x64-hs-optimized	0s
linux-x64-hs-minimal	0s
docs	0s
linux-x64-hs-zero	0s
linux-x86	0s
macos-aarch64	0s
windows-aarch64	0s
macos-x64	0s
linux-x64 / build	46s
windows-x64 / build (release)	44m 25s
windows-x64 / build (debug, --with-debug-level=fastdebug, -debug)	45m 54s
linux-x86	0s
macos-x64	0s
linux-cross-compile	0s
linux-x64	0s
windows-x64 / test (jdk/tier1 part 1)	33m 50s
windows-x64 / test (jdk/tier1 part 2)	25m 30s
windows-x64 / test (jdk/tier1 part 3)	13m 58s
windows-x64 / test (langtools/tier1)	37m 33s
windows-x64 / test (hs/tier1 common, test/hotspot/jtreg/:tier1_common, -debug)	7m 28s
windows-x64 / test (hs/tier1 compiler, test/hotspot/jtreg/:tier1_compiler, -debug)	1h 13m 28s
windows-x64 / test (hs/tier1 gc, test/hotspot/jtreg/:tier1_gc, -debug)	53m 9s
windows-x64 / test (hs/tier1 runtime, test/hotspot/jtreg/:tier1_runtime, -debug)	30m 38s
windows-x64 / test (hs/tier1 serviceability, test/hotspot/jtreg/:tier1_serviceability, -debug)	44m 56s
windows-x64 / test (lib-test/tier1, test/lib-test/:tier1, -debug)	7m 42s
Remove bundle artifacts	5s
	6h 59m 25s

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