[3.13] gh-129438: Update ``--enable-experimental-jit`` section with install requirements (GH-129450) (#129472)

gh-129438: Update ``--enable-experimental-jit`` section with install requirements (GH-129450)

Add a note to the `JIT` docs that building CPython with `JIT` requires Python 3.11 or newer.

(cherry picked from commit 652f66ac386dad5992c6f7c494871907272503f8)

Co-authored-by: Stan Ulbrych <89152624+StanFromIreland@users.noreply.github.com>
Co-authored-by: Brandt Bucher <brandtbucher@gmail.com>