Update compile-rtk-firmware.yml

Author: nseidle

.github/workflows/compile-rtk-firmware.yml

@@ -146,7 +146,7 @@ jobs:
           mv RTK_Surveyor.ino.bin ${{ env.FILENAME_PREFIX }}${{ env.FILE_ENDING_UNDERSCORE }}.bin
 
       - name: Upload binary to action
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with: 
           name: ${{ env.FILENAME_PREFIX }}${{ env.FILE_ENDING_UNDERSCORE }}
           path: ./Firmware/RTK_Surveyor/build/esp32.esp32.esp32/${{ env.FILENAME_PREFIX }}${{ env.FILE_ENDING_UNDERSCORE }}.bin