Change UBOOT_FILE variable value for C31 board

boards/.c31.yml

@@ -14,6 +14,6 @@ deploy-edgehog-c31:
      artifacts: true
   variables: &deploy-edgehog-c31
       <<: *build-edgehog-c31
-      UBOOT_FILE: u-boot.bin
+      UBOOT_FILE: u-boot.img
       KERNEL_FILE: Image
       AZURE_PATH: rockchip/c31
\ No newline at end of file

manifest-pipeline-yocto.yml

@@ -269,7 +269,7 @@ retrigger:
          echo $ART_PATH
          ls -la $ART_PATH
          find $ART_PATH -iname $UBOOT_FILE -exec cp -L {} $BASE_DIRECTORY/ \;
-         echo "UBOOT_FILE"
+         echo "$UBOOT_FILE"
          ls -la
          tar -czvf $BASE_DIRECTORY/$uboot_filename -C $BASE_DIRECTORY $UBOOT_FILE
          ls -la