* companion: protocol ver (FIRMWARE_VER_CODE) now 4

examples/companion_radio/main.cpp

@@ -83,7 +83,7 @@ static uint32_t _atoi(const char* sp) {
 
 /*------------ Frame Protocol --------------*/
 
-#define FIRMWARE_VER_CODE    3
+#define FIRMWARE_VER_CODE    4
 
 #ifndef FIRMWARE_BUILD_DATE
   #define FIRMWARE_BUILD_DATE   "7 Apr 2025"