fix: print_page plugin not working

[dlopez-bioinfo]

Print page plugin in doc seems not working.

[dlopez-bioinfo]

Fixed in 5065070 (PR #31). The print-site plugin now has add_to_navigation: true, so the "AFQuery — Complete Documentation" link appears at the bottom of the navigation. Live: https://dlopez-bioinfo.github.io/afquery/latest/print_page/