Improve `TypedDict` documentation (#770) #2865

Job	Run time
Run tests (3.12)	18s
Run tests (3.13.0)	20s
Run tests (3.13)	24s
Run tests (3.12.0)	25s
Run tests (3.9)	22s
Run tests (pypy3.9)	37s
Run tests (3.10.4)	22s
Run tests (3.10)	13s
Run tests (3.11.0)	20s
Run tests (3.11)	17s
Run tests (3.9.12)	19s
Build docs	13s
Run tests (3.14)	16s
Run tests (pypy3.11)	21s
Run tests (pypy3.10)	25s
Create an issue if daily tests failed	0s
	5m 12s

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