Fixed to call getMCUTemperature once.

examples/simple_repeater/MyMesh.cpp

@@ -174,9 +174,9 @@ int MyMesh::handleRequest(ClientInfo *sender, uint32_t sender_timestamp, uint8_t
     telemetry.reset();
     telemetry.addVoltage(TELEM_CHANNEL_SELF, (float)board.getBattMilliVolts() / 1000.0f);
 
-    float temperature = (float)board.getMCUTemperature();
+    float temperature = board.getMCUTemperature();
     if(!isnan(temperature)) { // Supported boards with built-in temperature sensor. ESP32-C3 may return NAN
-      telemetry.addTemperature(TELEM_CHANNEL_SELF, (float)board.getMCUTemperature()); // Built-in MCU Temperature
+      telemetry.addTemperature(TELEM_CHANNEL_SELF, temperature); // Built-in MCU Temperature
     }
 
     // query other sensors -- target specific