DOC: Add details of dropna in DataFrame.pivot_table #22617

Job	Run time
Linux-32-bit	18m 32s
Pyodide build	24m 3s
Linux-Musl	16m 33s
macos-13 actions-310.yaml	56m 56s
macos-13 actions-312.yaml	42m 52s
macos-13 actions-311.yaml	37m 52s
macos-14 actions-310.yaml	16m 22s
macos-14 actions-311.yaml	17m 45s
macos-14 actions-312.yaml	19m 17s
windows-latest actions-311.yaml	36m 49s
windows-latest actions-310.yaml	48m 56s
python-freethreading	23m 47s
windows-latest actions-312.yaml	47m 41s
python-dev (macOS-13)	36m 40s
python-dev (macOS-14)	13m 50s
python-dev (ubuntu-22.04)	20m 18s
python-dev (windows-latest)	23m 5s
Minimum Versions	24m 31s
Future infer strings (without pyarrow)	41m 26s
Locale: zh_CN	23m 29s
Locale: it_IT	23m 47s
Downstream Compat	5m 45s
Numpy Dev	16m 53s
Pyarrow Nightly	20m 37s
Future infer strings	49m 1s
Pypy	1m 29s
ubuntu-22.04 actions-311.yaml	44m 9s
ubuntu-22.04 actions-310.yaml	48m 31s
ubuntu-24.04-arm actions-311.yaml	26m 19s
ubuntu-24.04-arm actions-312.yaml	45m 12s
ubuntu-24.04-arm actions-310.yaml	28m 33s
ubuntu-22.04 actions-312.yaml	49m 39s
	15h 50m 39s

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