Update image reference for Trivy scanner step

.github/workflows/docker-build-push.yml

@@ -41,6 +41,7 @@ jobs:
                       type=raw,value=latest,enable={{is_default_branch}}
 
             - name: Build and push
+              id: build
               uses: docker/build-push-action@v6
               with:
                   context: .
@@ -53,7 +54,7 @@ jobs:
             - name: Run Trivy vulnerability scanner
               uses: aquasecurity/trivy-action@0.27.0
               with:
-                  image-ref: ${{ needs.build.outputs.image }}
+                  image-ref: ${{ steps.build.outputs.digest }}
                   format: 'sarif'
                   output: 'trivy-results.sarif'