chore(deps): update dependency @sanity/ui-workshop to ^2.0.21 #3466

Job	Run time
build	1m 16s
Run Studio End-to-end tests / prepare	1m 5s
Run Studio End-to-end tests / cache-cli	4m 48s
Node.js lts/* / ubuntu-latest	3m 32s
Node.js lts/* / macos-latest	4m 0s
ESLint	41s
Semantic release	29s
Run Studio End-to-end tests / install (chromium)	4m 0s
Run Studio End-to-end tests / install (firefox)	4m 20s
Run Studio End-to-end tests / playwright-test (chromium, 1, 2)	3m 46s
Run Studio End-to-end tests / playwright-test (chromium, 2, 2)	4m 39s
Run Studio End-to-end tests / playwright-test (firefox, 1, 2)	3m 32s
Run Studio End-to-end tests / playwright-test (firefox, 2, 2)	4m 50s
Run Studio End-to-end tests / merge-reports	36s
Run Studio End-to-end tests / Cleanup (${{ matrix.project }})	0s
	41m 34s

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