fix(uart): fixes misspeling

Co-authored-by: Copilot <[email protected]>

Author: SuGlider

cores/esp32/HardwareSerial.h

@@ -356,7 +356,7 @@ class HardwareSerial : public Stream {
 
   void setDebugOutput(bool);
 
-  // fuctions used to enable or disable UART pins signal inversion
+  // functions used to enable or disable UART pins signal inversion
   // returns the requested operation success status
   bool setRxInvert(bool);
   bool setTxInvert(bool);