[3.12] Resolve reference warnings in faq/library.rst (GH-108149) (#108182)

Resolve reference warnings in faq/library.rst (GH-108149)
(cherry picked from commit 6323bc33ff9f445a947adf4af42b8be7e44c730c)

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Co-authored-by: Erlend E. Aasland <erlend.aasland@protonmail.com>
Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>