Update pull-requests.org-wide.json

Author: colleenmcginnis

.buildkite/pull-requests.org-wide.json

@@ -73,6 +73,7 @@
         "elastic/logstash-docs",
         "elastic/observability-docs",
         "elastic/observability-robots-playground",
+        "elastic/search-ui",
         "elastic/security-docs",
         "elastic/stack-docs",
         "elastic/tech-content",