fix condition for saving source image

.github/workflows/docker-build-test-upload.yml

@@ -70,7 +70,7 @@ jobs:
           variant: ${{ inputs.parent-variant }}
 
       # Source/initial image is always based on jupyter/pytorch-notebook
-      - name: Source image 📥
+      - name: Pull source image 📥
         if: inputs.parent-image == ''
         run: docker pull quay.io/jupyter/${{ inputs.image }}:${{ inputs.variant }}
         shell: bash
@@ -97,17 +97,18 @@ jobs:
           BUILDKIT_PROGRESS: plain
         shell: bash
 
-      - name: Save image as a tar for later use 💾
-        if: inputs.parent-image != ''
+      - name: Save source image as a tar for later use 💾
+        if: inputs.parent-image == ''
         run: |
           mkdir -p /tmp/a2s/images/
-          docker save ${{ env.REGISTRY }}/${{ env.OWNER }}/${{ inputs.image }}:${{ inputs.variant }} | zstd > /tmp/a2s/images/${{ inputs.image }}--${{ inputs.variant }}.tar.zst
+          docker save quay.io/jupyter/${{ inputs.image }}:${{ inputs.variant }} | zstd > /tmp/a2s/images/${{ inputs.image }}--${{ inputs.variant }}.tar.zst
         shell: bash
 
-      - name: Save source image as a tar for later use 💾
+      - name: Save image as a tar for later use 💾
+        if: inputs.parent-image != ''
         run: |
           mkdir -p /tmp/a2s/images/
-          docker save quay.io/jupyter/${{ inputs.image }}:${{ inputs.variant }} | zstd > /tmp/a2s/images/${{ inputs.image }}--${{ inputs.variant }}.tar.zst
+          docker save ${{ env.REGISTRY }}/${{ env.OWNER }}/${{ inputs.image }}:${{ inputs.variant }} | zstd > /tmp/a2s/images/${{ inputs.image }}--${{ inputs.variant }}.tar.zst
         shell: bash
 
       - name: Upload image as artifact 💾