chore: prepare for 2.13.1

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

chore: prepare for 2.13.0 (pybind#5198)

* chore: prepare for 2.13.0

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

* Update changelog.rst

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Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

docs: a few missed changes for 2.12 (pybind#5074)

v2.11.1 release

v2.11.0 release

v2.10.4 release

v2.10.3 release

v2.10.2 release

v2.10.1 release

v2.10.0 release