build-acceptable-bundles.sh was not found

Set the working dir to the workspace path to fix

.tekton/push.yaml

@@ -134,6 +134,7 @@ spec:
           steps:
             - name: build-bundles
               image: quay.io/redhat-appstudio/appstudio-utils:{{ revision }}
+              workingDir: $(workspaces.artifacts.path)/source
               env:
               - name: REVISION
                 value: "$(params.revision)"