[3.14] gh-140065: Lexical analysis: Correct note about leading zeros in floating point numbers (GH-140066) (GH-140167)

(cherry picked from commit 1624c646b045df15ba41d17ff03231978b80c3ff)

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