mypy: update python version to avoid error/warning (#48593) #3

Job	Run time
changes	27s
prechecks / bootstrap-dev-rhel8	4m 25s
prechecks / validate	55s
prechecks / style	1m 54s
prechecks / import-check	57s
prechecks / pylint	1m 7s
prechecks / audit / package-audits (windows-latest, powershell Invoke-Expression -Command "./share/spack/qa/windows_t...	4m 30s
prechecks / audit / package-audits (ubuntu-latest, bash)	7m 50s
prechecks / audit / package-audits (macos-latest, bash)	4m 17s
all-prechecks	1s
unit-tests	0s
bootstrap	0s
coverage	0s
all	1s
	26m 24s

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