Fixed inaccuracy with youtube plugin help data

JJMumbleBot/plugins/extensions/youtube/help.html

@@ -7,7 +7,7 @@
 <b>!linkfront 'youtube_link'</b>: Priority inserts the given link to the front of the queue.<br>
 <b>!stop</b>: Stops the currently playing track and clears the queue.<br>
 <b>!shuffle</b>: Shuffles all the tracks in the queue.<br>
-<b>!volume/!v '0..1'</b>: Sets the bot audio volume.<br>
+<b>!volume/!v '0..1'</b>: Sets the youtube plugin audio volume.<br>
 <b>!replay/!rp</b>: Replays the last played audio track.<br>
 <b>!next/!skip</b>: Goes to the next song in the queue.<br>
 <b>!skipto 'number'</b>: Skips ahead in the queue by the provided number.<br>