Add category options to Indicator Feeds selector

Author: maxvp

src/content/docs/cloudflare-one/policies/gateway/dns-policies/index.mdx

@@ -347,6 +347,8 @@ Use this selector to filter DNS responses by their `TXT` records.
 
 <Render file="gateway/selectors/indicator-feeds" params={{ one: "dns" }} />
 
+<Render file="gateway/selectors/category-options" />
+
 ### Location
 
 <Render file="gateway/selectors/location" />