fix the previous commit which deleted a doc file but not the index entry
fix the previous commit which deleted a doc file but not the index entry

The CI still passed, or should I say, didn't run, and I failed to notice
this in manual review. Sorry!

pexip/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,mesonbuild/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,mesonbuild/meson,jpakkane/meson,pexip/meson,pexip/meson,jpakkane/meson,mesonbuild/meson,jpakkane/meson,jpakkane/meson,jpakkane/meson,pexip/meson,mesonbuild/meson,pexip/meson,pexip/meson,mesonbuild/meson,pexip/meson