Update pull_request_assignment.yml (#23579)

Correct the path of resource-manager.

Author: raych1

.github/pull_request_assignment.yml

@@ -69,10 +69,10 @@
     paths:
       - "specification/**/*Management/**/*.cadl"
       - "specification/**/*Management.Shared/**/*.cadl"
-      - "specification/**/resource-management/**/*.cadl"
+      - "specification/**/resource-manager/**/*.cadl"
       - "specification/**/*Management/**/*.tsp"
       - "specification/**/*Management.Shared/**/*.tsp"
-      - "specification/**/resource-management/**/*.tsp"
+      - "specification/**/resource-manager/**/*.tsp"
     reviewers:
       - raych1
       - lirenhe