[release-v1.18] Update quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2 Docker digest to 20eb21c

Signed-off-by: red-hat-konflux-kflux-prd-rh02 <190377777+red-hat-konflux-kflux-prd-rh02[bot]@users.noreply.github.com>

Author: red-hat-konflux-kflux-prd-rh02[bot]

.tekton/docker-build.yaml

@@ -534,7 +534,7 @@ spec:
       - name: name
         value: rpms-signature-scan
       - name: bundle
-        value: quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2@sha256:e127e0e0a5aab1364b560436594fe7ed67abcd5f8d6dd3ef14ac1f35cf81078c
+        value: quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2@sha256:20eb21c60522a12198205f70b9c58cb5d71db561a255a3ba1ced56ae7b4af270
       - name: kind
         value: task
       resolver: bundles