Fix PyInstaller temp directory accumulation on Windows #28

Job	Run time
test (3.10)	11s
test (3.12)	12s
test (3.9)	16s
test (3.11)	13s
get-next-version / Get next release version	13s
update-version	0s
release	-1s
build-binaries	-1s
	1m 3s

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