Update aquasecurity/trivy-action action to v0.29.0 (#659)

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

.github/workflows/container-scan.yml

@@ -23,7 +23,7 @@ jobs:
       run: docker build . --tag altinn-notifications:${{github.sha}}
 
     - name: Run Trivy vulnerability scanner
-      uses: aquasecurity/trivy-action@0.28.0
+      uses: aquasecurity/trivy-action@0.29.0
       with:
         image-ref: 'altinn-notifications:${{ github.sha }}'
         format: 'table'