Bump actions/setup-python from 4 to 5 #4731

Job	Run time
Check tket library version	16s
Build and test pytket (ubuntu)	8m 31s
Build and test pytket (windows)	17m 45s
Build and test pytket (macos) (macos-12)	8m 47s
Build and test pytket (macos) (macos-13-xlarge)	3m 46s
Build and test (tket) (ubuntu-22.04)	1m 24s
Build and test (tket) (macos-12)	2m 1s
Build and test (tket) (windows-2022)	4m 53s
Check documentation build	45s
Build and test (tket) (macos-13-xlarge)	1m 26s
Check C++ code formatting	43s
Check pytket line and branch coverage	17s
Publish pytket coverage	0s
All build and test jobs successful (or skipped)	1s
	50m 35s

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