[README] Fix roadmap doc link #234

Job	Run time
test-runtime-format	15s
test-runtime-format	15s
test-runtime-functionality	15s
test-runtime-functionality	15s
build (generic, 32)	47m 37s
build (generic, 32)	47m 37s
build (generic, 64)	47m 40s
build (generic, 64)	47m 40s
build (hifive_unmatched, 64)	1h 2m 33s
build (hifive_unmatched, 64)	1h 2m 33s
build (cva6, 32)	43m 53s
build (cva6, 32)	43m 53s
build (cva6, 64)	45m 11s
build (cva6, 64)	45m 11s
build (mpfs, 64)	6m 51s
build (mpfs, 64)	57m 27s
combine-caches	12m 28s
combine-caches	16m 7s
test-runtime-build	0s
test-system-functionality	0s
test-system-functionality / test-system (generic, 32)	1m 55s
test-runtime-build / build-runtime (generic, 32)	29s
test-system-functionality / test-system (generic, 64)	1m 42s
test-runtime-build / build-runtime (generic, 64)	29s
test-system-functionality / test-system (mpfs, 64)	1s
test-runtime-build / build-runtime (hifive_unmatched, 64)	47s
test-system-functionality / test-system (cva6, 64)	1s
test-runtime-build / build-runtime (cva6, 32)	27s
test-system-functionality / test-system (hifive_unmatched, 64)	1s
test-runtime-build / build-runtime (cva6, 64)	35s
test-runtime-build / build-runtime (mpfs, 64)	47s
	9h 54m 55s

Provide feedback