Uppercase HLS in preference description

src/prefs_impl.nim

@@ -83,7 +83,7 @@ genPrefs:
       "Enable mp4 video playback (only for gifs)"
 
     hlsPlayback(checkbox, false):
-      "Enable hls video streaming (requires JavaScript)"
+      "Enable HLS video streaming (requires JavaScript)"
 
     proxyVideos(checkbox, true):
       "Proxy video streaming through the server (might be slow)"