Push back version for OTA update testing

Author: nseidle

Firmware/RTK_Surveyor/RTK_Surveyor.ino

@@ -19,8 +19,8 @@
   Settings are loaded from microSD if available otherwise settings are pulled from ESP32's file system LittleFS.
 */
 
-const int FIRMWARE_VERSION_MAJOR = 3;
-const int FIRMWARE_VERSION_MINOR = 0;
+const int FIRMWARE_VERSION_MAJOR = 2;
+const int FIRMWARE_VERSION_MINOR = 7;
 
 #define COMPILE_WIFI //Comment out to remove WiFi functionality
 #define COMPILE_AP //Requires WiFi. Comment out to remove Access Point functionality