Fix Mypy CI #2890

Job	Run time
test_min_deps (ubuntu-latest)	57s
test_min_deps (windows-latest)	1m 47s
Integration Tests (pdm.lock)	24s
Integration Tests (pdm.minimal.lock)	25s
test_min_deps (macos-latest)	54s
test (3.9, ubuntu-latest)	1m 12s
test (3.9, macos-latest)	1m 7s
test (3.10, ubuntu-latest)	1m 9s
test (3.10, windows-latest)	1m 0s
test (3.9, windows-latest)	57s
test (3.10, macos-latest)	1m 11s
test (3.12, macos-latest)	50s
test (3.11, ubuntu-latest)	1m 10s
test (3.11, windows-latest)	1m 0s
test (3.11, macos-latest)	4s
test (3.12, ubuntu-latest)	1m 10s
test (3.13, macos-latest)	59s
test (3.12, windows-latest)	1m 0s
test (3.13, ubuntu-latest)	1m 10s
test (3.13, windows-latest)	1m 0s
Combine & check coverage	0s
	19m 26s

Provide feedback