rtmp-services: Fix trailing whitespace in services.json

plugins/rtmp-services/data/services.json

@@ -1289,7 +1289,7 @@
             "recommended": {
                 "keyint": 4,
                 "max video bitrate": 2500,
-                "max audio bitrate": 256,    
+                "max audio bitrate": 256,
                 "x264opts": "tune=zerolatency"
             }
         },