fix bug in emtpy comment

feature_measure/src/main/java/com/mrozon/feature_measure/presentation/EditMeasureFragmentViewModel.kt

@@ -61,7 +61,7 @@ class EditMeasureFragmentViewModel @Inject constructor(
         }
 
     @ExperimentalCoroutinesApi
-    val commentChannel = ConflatedBroadcastChannel<String>()
+    val commentChannel = ConflatedBroadcastChannel<String>("")
 
     @ExperimentalCoroutinesApi
     val measureValueChannel = ConflatedBroadcastChannel<String>()