chore(deps): update operator-1-15-bundle to a881619

Image created from 'https://github.com/openshift-pipelines/operator.git?rev=b10633caa98e6d61275416744da9d5ccda073827'

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]

project.yaml

@@ -100,4 +100,4 @@ images:
     value: quay.io/redhat-user-workloads/tekton-ecosystem-tenant/1-15/console-plugin-rhel8@sha256:7f00ff1b407d9ea107d3d969988a6279b28bde86943f490a007fa922dd40a1c3
   # operator-bundle
   - name: IMAGE_OPERATOR_BUNDLE
-    value: quay.io/redhat-user-workloads/tekton-ecosystem-tenant/1-15/operator-bundle-rhel8@sha256:998c9c2c2405a43020ed9ac44c12a35973c5919444352f1ed5a186a491d21622
+    value: quay.io/redhat-user-workloads/tekton-ecosystem-tenant/1-15/operator-bundle-rhel8@sha256:a881619c1fda3b5db2bbaa402a5384425310ddf23f12cecccd31adf6d534d364