vendor._gowin: fix clock name quotes for Gowin IDE #3526

Job	Run time
smoke (amaranth-lang/amaranth-boards)	17s
smoke (amaranth-lang/amaranth-boards)	31s
document	3s
document	3s
test (3.8)	25s
test (3.8)	2m 38s
smoke (amaranth-lang/amaranth-stdio)	29s
smoke (amaranth-lang/amaranth-stdio)	37s
check-links	29s
check-links	46s
test (3.9)	26s
test (3.9)	2m 24s
smoke (amaranth-lang/amaranth-soc)	29s
smoke (amaranth-lang/amaranth-soc)	37s
test (3.10)	26s
test (3.10)	2m 12s
test (3.11)	25s
test (3.11)	2m 42s
test (3.12)	27s
test (3.12)	3m 30s
test (pypy-3.8)	11s
test (pypy-3.8)	5m 14s
test (pypy-3.9)	8s
test (pypy-3.9)	5m 1s
test (pypy-3.10)	10s
test (pypy-3.10)	5m 0s
test (3.13-dev)	14s
test (3.13-dev)	3m 5s
publish-docs-dev	0s
publish-docs-dev	0s
publish-docs	0s
publish-docs	0s
required	1s
required	1s
publish-schemas	1s
publish-schemas	0s
publish-package	1s
publish-package	0s
publish-release	1s
publish-release	0s
	39m 4s

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