Update site url reference in actions

Author: sibiraj-s

.github/workflows/deploy.yml

@@ -53,7 +53,7 @@ jobs:
         uses: sibiraj-s/action-toenv@v1
         with:
           env: |
-            SITE_URL=${{ vars.SITE_URL }}
+            SITE_URL=${{ secrets.SITE_URL }}
 
       - name: Build and push app image
         uses: docker/build-push-action@v6