build-sd-images.yml: Fix issue with artifact file name containing spaces

Author: theCalcaholic

.github/workflows/build-sd-images.yml

@@ -160,7 +160,7 @@ jobs:
       - name: Prepare test
         run: |
           set -x
-          mv output/${ARTIFACT_FILE?} ncp.img
+          mv "output/${ARTIFACT_FILE?}" ncp.img
           sudo apt-get install -y systemd-container
           python3 -m venv ./.venv
           . ./.venv/bin/activate