fix: Skip `fork` and `forkserver` on `win32` #505

Job	Run time
build / lint-rust	23s
build / lint-python	11s
build / lint-toml	6s
build / generate-license	2m 18s
build / check-crates-patch	-1s
build / Linux arm64 (3.13t)	11m 55s
build / Linux x86_64 (3.13t)	14m 4s
build / macOS arm64 (abi3)	11m 39s
build / Linux x86_64 (abi3)	19m 49s
build / Linux arm64 (abi3)	12m 16s
build / Linux arm64 (3.14t)	12m 24s
build / macOS arm64 (3.14t)	8m 38s
build / Windows x86_64 (3.14t)	16m 40s
build / Linux x86_64 (3.14t)	13m 54s
build / macOS arm64 (3.13t)	9m 12s
build / Windows x86_64 (3.13t)	16m 51s
build / Windows x86_64 (abi3)	12m 33s
build / Source distribution	-1s
build / macOS x86_64 (${{ matrix.python-tag }})	-1s
build / Build docs	59s
build / Merge build artifacts	0s
test / test-matrix (3.12, abi3, false)	4m 2s
test / test-matrix (3.10, abi3, false)	4m 0s
test / test-matrix (3.14, abi3, false)	4m 55s
test / test-matrix (3.13, abi3, false)	3m 53s
test / test-matrix (3.11, abi3, false)	4m 7s
test / test-matrix (3.13t, 3.13t, true)	55s
test / test-matrix (3.14t, 3.14t, true)	3m 7s
	3h 8m 48s

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