JSON: Correcting the Sensor Class field

Signed-off-by: Abhishek Malik <abhishek.malik@intel.com>

src/groveemg/groveemg.json

@@ -3,7 +3,7 @@
     "Description": "Grove EMG Muscle Signal Reader Library",
     "Sensor Class":
     {
-        "groveemg":
+        "GroveEMG":
         {
             "Name": "Grove Electromyography (EMG) Sensor",
             "Description": "Grove EMG muscle signal reader gathers small muscle signals, then processes them, and returns the result.",
@@ -34,4 +34,4 @@
             }
         }
     }
-}
+}