DOC: add missing 'In typing since ...' mention for `TypeIs` (#548) #1854

Job	Run time
Lint	5s
Run tests (3.8)	4s
Run tests (3.8.0)	12s
Run tests (3.9)	9s
Run tests (3.9.0)	11s
Run tests (3.10)	5s
Run tests (3.10.0)	11s
Run tests (3.11)	7s
Run tests (3.11.0)	11s
Run tests (3.12)	10s
Run tests (3.12.0)	19s
Run tests (3.13)	5s
Run tests (3.13.0)	24s
Run tests (pypy3.8)	10s
Run tests (pypy3.9)	9s
Run tests (pypy3.10)	11s
Create an issue if daily tests failed	0s
	2m 43s

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