[MAINT] Do not use copyright year ranges #6308

Job	Run time
build_linux (3.14)	5m 3s
build_windows (3.14)	7m 15s
build_linux (3.13)	5m 12s
build_linux (3.10)	5m 30s
build_linux (3.12)	5m 23s
build_windows (3.12)	8m 24s
build_windows (3.13)	10m 4s
build_windows (3.10)	8m 54s
build_linux (3.11)	5m 38s
build_windows (3.11)	8m 42s
test_examples_linux (3.11, false, ubuntu-latest)	4m 50s
test_linux (3.10, false, ubuntu-latest)	2m 15s
test_linux (3.14, false, ubuntu-latest)	2m 17s
test_linux (3.11, false, ubuntu-latest)	2m 27s
test_linux (3.13, false, ubuntu-latest)	2m 8s
test_linux (3.12, false, ubuntu-latest)	2m 16s
upload_linux	-1s
test_windows (3.14, false, windows-latest)	3m 23s
test_windows (3.12, false, windows-latest)	3m 38s
test_windows (3.13, false, windows-latest)	3m 14s
test_windows (3.11, false, windows-latest)	3m 44s
test_windows (3.10, false, windows-latest)	3m 10s
upload_windows	0s
Clean up anaconda packages	0s
	1h 43m 26s

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