[release-v1.15] Update quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2 Docker digest to 90c2b32

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@sha256:49ff6d117c3e9dc3966d1244e118e168b3501742ec14c3a4161a276ff48d04d5
+        value: quay.io/konflux-ci/konflux-vanguard/task-rpms-signature-scan:0.2@sha256:90c2b32ebf0a00f42c0c1d1675feb75ba71793ad1a4c22ddea7cdc71ed997a04
       - name: kind
         value: task
       resolver: bundles