Mention libsndfile in build guides

Author: rfomin

docs/guides/building_on_macos.md

@@ -13,7 +13,7 @@ On arm64 machines, brew will be installed in `/opt/homebrew`.
 ## Install Build Dependencies
 Install cmake, SDL2 and additional dependencies for DSDA-Doom:
 ```
-brew install cmake pkgconf libxmp fluid-synth libvorbis libzip mad portmidi sdl2 sdl2_image sdl2_mixer
+brew install cmake pkgconf libxmp fluid-synth libvorbis libzip mad portmidi sdl2 sdl2_image sdl2_mixer libsndfile
 ```
 ## Build DSDA-Doom
 Make a clone of the DSDA-Doom Git repository:

docs/guides/building_on_windows.md

@@ -123,7 +123,7 @@ pacman -S mingw-w64-ucrt-x86_64-gcc cmake git ninja pkgconf
 Additionally, you will need the following external libraries:
 
 ```
-pacman -S mingw-w64-ucrt-x86_64-libxmp mingw-w64-ucrt-x86_64-fluidsynth mingw-w64-ucrt-x86_64-libmad mingw-w64-ucrt-x86_64-libvorbis mingw-w64-ucrt-x86_64-libzip mingw-w64-ucrt-x86_64-portmidi mingw-w64-ucrt-x86_64-SDL2 mingw-w64-ucrt-x86_64-SDL2_image mingw-w64-ucrt-x86_64-SDL2_mixer
+pacman -S mingw-w64-ucrt-x86_64-libxmp mingw-w64-ucrt-x86_64-fluidsynth mingw-w64-ucrt-x86_64-libmad mingw-w64-ucrt-x86_64-libvorbis mingw-w64-ucrt-x86_64-libzip mingw-w64-ucrt-x86_64-portmidi mingw-w64-ucrt-x86_64-SDL2 mingw-w64-ucrt-x86_64-SDL2_image mingw-w64-ucrt-x86_64-SDL2_mixer mingw-w64-ucrt-x86_64-libsndfile
 ```
 
 ### Building