docs: prepare for 2.13.0 (#5187)

* docs: prepare for 2.13.0

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

* docs: reword cross-compiling entry

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

* Update changelog.rst

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