[FIX] Adapt to newly released pandas 2.1 #2576

Job	Run time
lint	1m 12s
Released (ubuntu-22.04, py3.8)	15m 6s
Released (ubuntu-22.04, py3.9)	14m 27s
Released (ubuntu-22.04, py3.10)	13m 32s
Released (ubuntu-22.04, py3.11)	19m 0s
Latest (ubuntu-22.04, py3.10)	19m 10s
Oldest dependencies (ubuntu-20.04, py3.8)	20m 15s
PyQt6 (ubuntu-22.04, py3.9)	9m 38s
Released (macos-latest, py3.8)	25m 37s
Released (macos-latest, py3.9)	16m 10s
Released (macos-latest, py3.10)	27m 0s
Released (macos-latest, py3.11)	29m 39s
Released (windows-latest, py3.8)	20m 3s
Released (windows-latest, py3.9)	20m 32s
Released (windows-latest, py3.10)	21m 47s
Released (windows-latest, py3.11)	25m 57s
Latest (windows-latest, py3.10)	22m 17s
Latest (macos-latest, py3.10)	27m 48s
PyQt6 (windows-latest, py3.10)	11m 7s
PyQt6 (macos-latest, py3.9)	13m 55s
	6h 14m 12s

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