Bump actions/setup-python to v5 #62

Job	Run time
Build ijson and run unit tests (ubuntu-latest, 3.7)	31s
Build ijson and run unit tests (ubuntu-latest, 3.8)	20s
Build ijson and run unit tests (ubuntu-latest, 3.9)	21s
Build ijson and run unit tests (ubuntu-latest, 3.10)	22s
Build ijson and run unit tests (ubuntu-latest, 3.11)	20s
Build ijson and run unit tests (ubuntu-latest, 3.12)	22s
Build ijson and run unit tests (windows-2019, 3.7)	1m 11s
Build ijson and run unit tests (windows-2019, 3.8)	1m 13s
Build ijson and run unit tests (windows-2019, 3.9)	1m 13s
Build ijson and run unit tests (windows-2019, 3.10)	51s
Build ijson and run unit tests (windows-2019, 3.11)	46s
Build ijson and run unit tests (windows-2019, 3.12)	1m 13s
Build ijson and run unit tests (macos-12, 3.7)	33s
Build ijson and run unit tests (macos-12, 3.8)	26s
Build ijson and run unit tests (macos-12, 3.9)	25s
Build ijson and run unit tests (macos-12, 3.10)	25s
Build ijson and run unit tests (macos-12, 3.11)	26s
Build ijson and run unit tests (macos-12, 3.12)	27s
Build ijson and run unit tests (ubuntu-latest, pypy3.9)	53s
Build ijson and run unit tests (ubuntu-latest, pypy3.10)	29s
	12m 47s

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