.github: Fix Python version (to 3.11) #478

Job	Run time
Analyze (ArmPkg, IA32,X64)	9m 26s
Analyze (CryptoPkg, IA32)	27m 46s
Analyze (CryptoPkg, X64)	29m 20s
Analyze (DynamicTablesPkg, IA32,X64)	10m 15s
Analyze (FatPkg, IA32,X64)	16m 33s
Analyze (FmpDevicePkg, IA32,X64)	16m 40s
Analyze (IntelFsp2Pkg, IA32,X64)	13m 30s
Analyze (IntelFsp2WrapperPkg, IA32,X64)	15m 12s
Analyze (MdeModulePkg, IA32)	26m 10s
Analyze (MdeModulePkg, X64)	29m 12s
Analyze (MdePkg, IA32,X64)	18m 58s
Analyze (PcAtChipsetPkg, IA32,X64)	11m 50s
Analyze (PrmPkg, IA32,X64)	16m 40s
Analyze (SecurityPkg, IA32,X64)	18m 23s
Analyze (ShellPkg, IA32,X64)	21m 23s
Analyze (SourceLevelDebugPkg, IA32,X64)	18m 39s
Analyze (StandaloneMmPkg, IA32,X64)	11m 9s
Analyze (UefiCpuPkg, IA32,X64)	18m 24s
Analyze (UnitTestFrameworkPkg, IA32,X64)	16m 20s
	5h 45m 50s

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