Upon merge of void-packages #22249, modify "NVIDIAOptimus" section

[flexibeast]

As per @st3r4g's request here:

after this gets merged, can you modify https://docs.voidlinux.org/config/graphical-session/graphics-drivers/optimus.html#prime-render-offload mentioning that the script is already provided?

[st3r4g]

It was merged. Another little thing, can you also fix NVIDIAOptimus -> NVIDIA Optimus in SUMMARY.md?

[flexibeast]

So something like:

on the NVIDIA GPU, as done by the provided prime-run wrapper script:

?

can you also fix

Sure, will do.

[ericonr]

About that... rust-lang/mdBook#1218

[ericonr]

@flexibeast I can do this one, unless you've already started on it.

[flexibeast]

@ericonr: No, i hadn't already started; go ahead.

Re. that mdBook issue, ah okay. Related: i had to change the title of the "Installation via chroot" section (to "x86/x86_64" rather than "x86 or x86_64") to make it short enough to - just - fit within the 80-character limit.

[ericonr]

@flexibeast @st3r4g rust-lang/mdBook#1291 :D