Fixed constexpr significant bits value for double #3246

Job	Run time
build_linux (3.9)	40m 59s
build_linux (3.10)	35m 33s
build_linux (3.11)	31m 58s
build_windows (3.9)	55m 32s
build_windows (3.10)	53m 58s
build_windows (3.11)	1h 0m 48s
test_linux (3.9, false, ubuntu-20.04)	7m 7s
test_linux (3.10, false, ubuntu-20.04)	6m 51s
test_linux (3.11, false, ubuntu-20.04)	6m 39s
test_examples_linux (3.9, false, ubuntu-20.04)	7m 59s
array-api-conformity (3.10, false, ubuntu-20.04)	26m 14s
upload_linux	0s
test_windows (3.9, false, windows-latest)	8m 55s
test_windows (3.10, false, windows-latest)	8m 56s
test_windows (3.11, false, windows-latest)	8m 17s
upload_windows	0s
	5h 59m 46s

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