workflows: fix windows check for container image (fluent#10572)

* workflows: fix windows check for container image

Signed-off-by: Eduardo Silva <edsiper@gmail.com>

---------

Signed-off-by: Eduardo Silva <edsiper@gmail.com>
Signed-off-by: Pat <patrick.j.k.stephens@gmail.com>
Co-authored-by: Pat <pat@fluent.do>

Author: 2 people

.github/workflows/staging-release.yaml

@@ -587,8 +587,9 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Check the image exists
+        # Use manifest inspect rather than pulling the image so the Windows host version does not need to match the container image
         run: |
-          docker pull "$STAGING_IMAGE_NAME:$TAG"
+          docker manifest inspect "$STAGING_IMAGE_NAME:$TAG"
         env:
           TAG: ${{ matrix.tag }}
         shell: bash