chore(deps): update manual-approval-gate-nightly-webhook to ffbebc2

Image created from 'https://github.com/openshift-pipelines/p12n-manual-approval-gate.git?rev=3c5ead65441984f3e35987ec9a16485d8282200b'

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

@@ -65,7 +65,7 @@ images:
     value: quay.io/redhat-user-workloads/tekton-ecosystem-tenant/pipelines-serve-tkn-cli-rhel10@sha256:a420a2b11b54172644b2247640fd39bbc8af87fe80fdd0f9670b47fefad39c87
   # manual-approval-gate
   - name: IMAGE_MAG_MANUAL_APPROVAL
-    value: quay.io/redhat-user-workloads/tekton-ecosystem-tenant/pipelines-manual-approval-gate-webhook-rhel10@sha256:0f50927363b6a7c249ca1b00544bd19e425e50931535f596a9417e1f048e655c
+    value: quay.io/redhat-user-workloads/tekton-ecosystem-tenant/pipelines-manual-approval-gate-webhook-rhel10@sha256:ffbebc2376d6062565f337f3aaa1b64c0948738f8b6f95bfe46fc254ce53c8e1
   - name: IMAGE_MAG_TEKTON_TASKGROUP_CONTROLLER
     value: quay.io/redhat-user-workloads/tekton-ecosystem-tenant/pipelines-manual-approval-gate-controller-rhel10@sha256:f71f175029f6035b1b2f76ce5063afcb0f1b2cdad84c702bfcf1a39bfa579a60
   # pipelines-as-code