Belated minor follow-on to https://github.com/google/pybind11k/pull/30108.

This is to avoid confusing people with an obsolete name.

Similar to: https://github.com/google/pybind11k/pull/30126

The new and unrelated `build_and_test / ubuntu-latest cmake` failure will be addressed separately (see https://github.com/pybind/pybind11_abseil/pull/25#issuecomment-2173642297).

PiperOrigin-RevId: 644009757