fix: add CF_SITEKEY variable to GitHub Actions environment

Author: ibiixie

.github/workflows/deploy.yml

@@ -20,6 +20,7 @@ jobs:
       - name: Build Docker image
         uses: docker/bake-action@v6
         env:
+          CF_SITEKEY: ${{ vars.CF_SITEKEY }}
           GRAPHQL_GITHUB_API_TOKEN: ${{ secrets.GRAPHQL_GITHUB_API_TOKEN }}
         with:
           files: |