bug#33177: Sound Services manual typo

[Jelle Licht]

The "Sound Services" section[1] of the manual starts of on a confusing
note for me, but this might just be a typo.

The confusing sentence is:
> The ‘(gnu services sound)’ module provides a service to configure the
> Advanced Linux Sound Architecture (ALSA) system, which making
                                                         ^^^^^^
> PulseAudio the preferred ALSA output driver.

I was thinking of simply replacing "making" with "makes" in that
snippet, but I am not sure whether this still keeps the (intended)
meaning intact.

[1]: `(info "(Guix)Sound Services")'

NB. When creating patches for the manual, can one just commit the
changes and be done with it, or does this involve some extra steps? I
ask since I found the offending sentence in both guix.texi and
guix.fr.texi.