Add required task rpms-signature-scan

Signed-off-by: savitaashture <[email protected]>

.tekton/docker-build-ta.yaml

@@ -305,6 +305,28 @@ spec:
       operator: in
       values:
       - "false"
+  - name: rpms-signature-scan
+    params:
+    - name: image-url
+      value: $(tasks.build-image-index.results.IMAGE_URL)
+    - name: image-digest
+      value: $(tasks.build-image-index.results.IMAGE_DIGEST)
+    runAfter:
+    - build-image-index
+    taskRef:
+      params:
+      - name: name
+        value: rpms-signature-scan
+      - name: bundle
+        value: quay.io/konflux-ci/tekton-catalog/task-rpms-signature-scan:0.2@sha256:0c9667fba291af05997397a32e5e938ccaa46e93a2e14bad228e64a6427c5545
+      - name: kind
+        value: task
+      resolver: bundles
+    when:
+    - input: $(params.skip-checks)
+      operator: in
+      values:
+      - "false"
   - name: clair-scan
     params:
     - name: image-digest