chore(deps): update vexxhost/docker-atmosphere digest to 286455d (#1045)

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/build.yml

@@ -25,7 +25,7 @@ jobs:
         with:
           egress-policy: audit
 
-      - uses: vexxhost/docker-atmosphere/.github/actions/build-image@e012e9b7df8e22166070c4389caf52285807598a # main
+      - uses: vexxhost/docker-atmosphere/.github/actions/build-image@286455d3dcce221b89a5b9cfb836ef2ee4f7df69 # main
         with:
           image-name: python-openstackclient
           push: ${{ github.event_name != 'pull_request' }}