Update on Audio Troubleshooting Guide

[marwinpinlac-web]

Updated the file: audio.md

Added new images and removed unnecessary command line images.

[jacobgkau]

@marwinpinlac-web I made a few small tweaks, and this is almost ready. When you have time, could you please update the Launcher and Settings screenshots to show COSMIC, and if you still have the original screenshots for the rest of the new ones you're adding, please bring them in again at their full size instead of the reduced resolution?

[jacobgkau]

@marwinpinlac-web Screenshots that are more than a megabyte should be converted to JPG so they take up less space/bandwidth. You can do this by opening the file and doing a "Save as..." I've gone ahead and done it for you this time.

Edit: My next commit ran optipng on the remaining PNGs to reduce their size as well. This is a lossless command.

[jacobgkau]

I'm not sure if adding the word "guide" to the article title is really useful or necessary, but I'm not strongly opposed to it. We may want to consider whether other similarly-named articles, like the current "Bluetooth Troubleshooting", should also be changed similarly in the future.