chore(deps): update dependency @sanity/ui-workshop to ^2.0.20 #3401

Job	Run time
build	1m 20s
Run Studio End-to-end tests / prepare	1m 4s
Run Studio End-to-end tests / cache-cli	4m 52s
ESLint	43s
Node.js lts/* / ubuntu-latest	3m 26s
Node.js lts/* / macos-latest	3m 24s
Semantic release	27s
Run Studio End-to-end tests / install (chromium)	2m 16s
Run Studio End-to-end tests / install (firefox)	2m 13s
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 51s
Run Studio End-to-end tests / playwright-test (firefox, 1, 2)	3m 26s
Run Studio End-to-end tests / playwright-test (firefox, 2, 2)	4m 35s
Run Studio End-to-end tests / merge-reports	59s
Run Studio End-to-end tests / Cleanup (chromium)	6s
Run Studio End-to-end tests / Cleanup (firefox)	4s
	36m 59s

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