add issue category replay as search field (#9082)

Author: bruno-garcia

docs/product/reference/search/searchable-properties/issues.mdx

@@ -242,7 +242,7 @@ The short issue code, for example `SENTRY-ABC`.
 
 ### `issue.category`
 
-The category of the issue (either `error` or `performance`).
+The category of the issue. For example: `error`, `performance`, `replay` and `cron`.
 
 - **Type:** string