This is another release candidate. See the changelog in the docs for the combined changelog; this is just the changes since RC 2:

• fix(types): type hints from future python versions by @InvincibleRMC in https://github.com/pybind/pybind11/pull/5693
• fix: allow subinterpreters to be manually disabled by @henryiii in https://github.com/pybind/pybind11/pull/5708
• fix: follow rest of pybind11 closer with PYBIND11_HAS_SUBINTERPRETER_SUPPORT by @henryiii in https://github.com/pybind/pybind11/pull/5710
• fix: modify the internals pointer-to-pointer implementation to not use thread_local by @b-pass in https://github.com/pybind/pybind11/pull/5709
• fix: expose required symbol using clang by @petersteneteg in https://github.com/pybind/pybind11/pull/5700
• fix: handle null py::handle and add tests for py::scoped_critical_section by @XuehaiPan in https://github.com/pybind/pybind11/pull/5706
• ci: avoid brownout (and removal) of windows-2019 by @henryiii in https://github.com/pybind/pybind11/pull/5712
• ci: ios by @henryiii in https://github.com/pybind/pybind11/pull/5705
• ci: reduced runs on draft PRs by @henryiii in https://github.com/pybind/pybind11/pull/5707