DOC: Add note on inference behavior of apply with result_type='expand' #23670

Job	Run time
python-dev	0s
Linux-32-bit	6m 14s
Pyodide build	6m 13s
Linux-Musl	6m 15s
macos-13 actions-310.yaml	6m 11s
macos-13 actions-312.yaml	6m 15s
macos-14 actions-312.yaml	6m 12s
macos-14 actions-313.yaml	6m 12s
macos-13 actions-313.yaml	6m 12s
windows-latest actions-312.yaml	6m 11s
windows-latest actions-310.yaml	6m 9s
macos-13 actions-311.yaml	6m 12s
macos-14 actions-310.yaml	6m 14s
macos-14 actions-311.yaml	6m 12s
ubuntu-24.04-arm actions-310.yaml	6m 14s
windows-latest actions-311.yaml	6m 11s
ubuntu-24.04-arm actions-311.yaml	6m 12s
windows-latest actions-313.yaml	6m 10s
Locale: zh_CN	6m 15s
Freethreading	6m 12s
Numpy Dev	6m 15s
Pypy	1m 17s
Locale: it_IT	6m 14s
Future infer strings	6m 14s
ubuntu-24.04 actions-313.yaml	6m 12s
Future infer strings (without pyarrow)	6m 14s
ubuntu-24.04 actions-310.yaml	6m 15s
Pyarrow Nightly	6m 18s
ubuntu-24.04 actions-311.yaml	6m 14s
ubuntu-24.04 actions-312.yaml	6m 13s
Downstream Compat	5m 15s
ubuntu-24.04-arm actions-313.yaml	6m 15s
ubuntu-24.04-arm actions-312.yaml	6m 14s
Minimum Versions	6m 11s
	3h 19m 17s

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