Prepare release notes for v1.0.0-rc1400 #4300

Job	Run time
Build distribution packages	18s
Test with nox (ubuntu-20.04, 3.11, ci_checks_max)	3m 35s
Test with nox (ubuntu-20.04, 3.11, pytest_min)	2m 4s
Test with nox (ubuntu-20.04, 3.12, ci_checks_max)	3m 42s
Test with nox (ubuntu-20.04, 3.12, pytest_min)	2m 4s
Cross-arch tests with nox	0s
Test documentation website generation	40s
Cross-arch tests with nox	0s
Test package installation in different architectures (ubuntu-20.04, 3.11)	2m 59s
Test package installation in different architectures (ubuntu-20.04, 3.12)	2m 48s
Test package installation in different architectures	1s
Test with nox	1s
Publish documentation website to GitHub pages	0s
Create GitHub release	0s
Publish packages to PyPI	0s
	18m 12s

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