refactor: rename CallNotify to RtcNotification to match new event

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/notification/NotificationData.kt

@@ -49,9 +49,9 @@ sealed interface NotificationContent {
             val senderId: UserId,
         ) : MessageLike
 
-        data class CallNotify(
+        data class RtcNotification(
             val senderId: UserId,
-            val type: CallNotifyType,
+            val type: RtcNotificationType,
             val expirationTimestampMillis: Long
         ) : MessageLike
 
@@ -119,7 +119,7 @@ sealed interface NotificationContent {
     ) : NotificationContent
 }
 
-enum class CallNotifyType {
+enum class RtcNotificationType {
     RING,
     NOTIFY
 }