Disable scheduled workflow to be run in fork repos #5522

Job	Run time
build_linux (3.9)	36m 48s
build_linux (3.10)	37m 7s
build_linux (3.11)	37m 8s
build_linux (3.12)	37m 12s
build_linux (3.13)	37m 43s
build_windows (3.9)	1h 6m 23s
build_windows (3.10)	1h 8m 34s
build_windows (3.11)	1h 1m 39s
build_windows (3.12)	1h 20m 56s
build_windows (3.13)	1h 2m 12s
test_examples_linux (3.11, false, ubuntu-22.04)	7m 37s
array-api-conformity (3.10, false, ubuntu-22.04)	5m 32s
test_linux (3.9, false, ubuntu-22.04)	11m 29s
test_linux (3.10, false, ubuntu-22.04)	12m 23s
test_linux (3.11, false, ubuntu-22.04)	10m 59s
test_linux (3.12, false, ubuntu-22.04)	11m 17s
test_linux (3.13, false, ubuntu-22.04)	11m 13s
upload_linux	0s
test_windows (3.9, false, windows-2019)	13m 50s
test_windows (3.10, false, windows-2019)	14m 21s
test_windows (3.11, false, windows-2019)	14m 29s
test_windows (3.12, false, windows-2019)	14m 24s
test_windows (3.13, false, windows-2019)	14m 43s
upload_windows	0s
Clean up anaconda packages	0s
	11h 7m 59s

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