ci: Fix mypy, gevent #4017

Job	Run time
Network (latest) (3.12, ubuntu-22.04)	1m 25s
Network (latest) (3.9, ubuntu-22.04)	1m 23s
Network (latest) (3.13, ubuntu-22.04)	1m 51s
Network (pinned) (3.6, ubuntu-22.04)	2m 2s
Network (pinned) (3.10, ubuntu-22.04)	1m 36s
Network (pinned) (3.7, ubuntu-22.04)	1m 53s
Network (pinned) (3.8, ubuntu-22.04)	1m 35s
Network (pinned) (3.11, ubuntu-22.04)	1m 32s
Network (pinned) (3.13, ubuntu-22.04)	2m 22s
Network (pinned) (3.9, ubuntu-22.04)	2m 0s
Network (pinned) (3.12, ubuntu-22.04)	2m 38s
All pinned Network tests passed	4s
	20m 21s

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