DOC: fix SA01, ES01 for pandas.tseries.offsets.SemiMonthEnd (#59856) #44420

Job	Run time
ASV Benchmarks	19m 17s
Build Docker Dev Environment	2m 31s
Docstring validation, typing, and other manual pre-commit hooks	17m 1s
Test install requirements-dev.txt	1m 40s
	40m 29s

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