Update signing.py (#831) #506

Job	Run time
Python 3.7 on macos-13	3m 25s
Python 3.7 on Windows x86	3m 30s
Python 3.12 on macos-13	2m 54s
Linux docs	1m 13s
Python 3.8 on Windows x86	3m 33s
Python 3.12 (minimal build) on macos-13	3m 8s
Linux meta	1m 11s
Python 3.9 on Windows x86	3m 26s
Python 3.12 on macos-latest	1m 49s
Linux mypy	1m 1s
Python 3.10 on Windows x86	2m 35s
Python 3.12 (minimal build) on macos-latest	1m 21s
Linux pypy3	2m 45s
Python 3.11 on Windows x86	2m 9s
Linux pypy3	2m 46s
Python 3.12 on Windows x86	3m 31s
Linux py37	1m 49s
Python 3.7 on Windows x64	2m 11s
Linux py38	1m 41s
Python 3.8 on Windows x64	1m 51s
Linux py39	1m 41s
Python 3.9 on Windows x64	1m 51s
Linux py310	1m 51s
Python 3.10 on Windows x64	2m 26s
Linux py311	1m 46s
Python 3.11 on Windows x64	2m 18s
Linux py312	1m 54s
Python 3.12 on Windows x64	2m 20s
Linux py312 system	2m 23s
Linux py312 minimal	1m 43s
	1h 8m 2s

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