PD-44952 Update Cortex domain [safe to merge] (#12)

Author: simonirwin-r7

cortex.yaml

@@ -10,7 +10,7 @@ info:
   x-cortex-tag: pysubstringsearch
   x-cortex-type: service
   x-cortex-domain-parents:
-  - tag: threatintel-rd
+  - tag: threatintel
 openapi: 3.0.1
 servers:
 - url: "/"