Update cava-colors

Fixes as an error that does not display cava and gives this error-
```Error loading config. Only 'ncurses' output method supports HTML colors. Please change the colours or the output method.
As of version 0.7.0 ncurses is no longer the default output method
Gradient color 1 is invalid. It must be HTML color of the form '#xxxxxx'.```

config/wal/templates/cava-colors

@@ -86,7 +86,7 @@ source = auto
 # 'raw' defaults to 200 bars, which can be adjusted in the 'bars' option above.
 #
 # 'sdl' uses the Simple DirectMedia Layer to render in a graphical context.
-; method = ncurses
+method = ncurses
 
 # Visual channels. Can be 'stereo' or 'mono'.
 # 'stereo' mirrors both channels with low frequencies in center.