chore(deps): update dependency @sanity/ui-workshop to ^2.0.20 #3395

Job	Run time
build	1m 33s
Run Studio End-to-end tests / prepare	1m 5s
Run Studio End-to-end tests / cache-cli	4m 56s
Node.js lts/* / ubuntu-latest	3m 21s
Node.js lts/* / macos-latest	3m 6s
ESLint	41s
Semantic release	31s
Run Studio End-to-end tests / install (chromium)	3m 22s
Run Studio End-to-end tests / install (firefox)	3m 33s
Run Studio End-to-end tests / playwright-test (chromium, 1, 2)	3m 13s
Run Studio End-to-end tests / playwright-test (chromium, 2, 2)	4m 58s
Run Studio End-to-end tests / playwright-test (firefox, 1, 2)	3m 22s
Run Studio End-to-end tests / playwright-test (firefox, 2, 2)	5m 10s
Run Studio End-to-end tests / merge-reports	44s
Run Studio End-to-end tests / Cleanup (chromium)	6s
Run Studio End-to-end tests / Cleanup (firefox)	4s
	39m 45s

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