[description] Add description to icu_provider_baked #2571

Job	Run time
Check Credentials for jobs that need JSON credentials	3s
WASM Demo	1m 40s
bench-binsize	2m 26s
bench-memory (macos-latest)	4m 3s
bench-memory (ubuntu-latest)	3m 20s
bench-memory (windows-latest)	8m 0s
bench-perf (components/collections)	4m 35s
bench-perf (components/datetime)	39s
bench-perf (components/locale)	2m 31s
bench-perf (components/locale_core)	5m 13s
bench-perf (components/plurals)	6m 0s
bench-perf (components/segmenter)	3m 37s
bench-perf (provider/blob)	2m 29s
bench-perf (utils/fixed_decimal)	5m 44s
bench-perf (utils/litemap)	2m 10s
bench-perf (utils/tinystr)	6m 33s
bench-perf (utils/writeable)	3m 57s
bench-perf (utils/zerotrie)	5m 8s
bench-perf (utils/zerovec)	8m 43s
C++ docs	37s
Rust docs	4m 53s
TypeScript docs	42s
Dart docs	1m 18s
Deploy to GitHub Pages	8m 2s
	1h 32m 23s

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