ports/rp2/boards: Update IoT Node LoRaWAN image name

Signed-off-by: Dryw Wade <dryw.wade@sparkfun.com>

Author: sfe-SparkFro

ports/rp2/boards/SPARKFUN_IOTNODE_LORAWAN_RP2350/board.json

@@ -15,7 +15,7 @@
         "microSD"
     ],
     "images": [
-        "todo.jpg"
+        "26060-IoT-Node-LoRaWAN-Feature-new.jpg"
     ],
     "mcu": "rp2350",
     "product": "IoT Node LoRaWAN RP2350",