Add agentic application to cog services swagger. (#37849)

* Add agentic application to cog services swagger.

* Address pipelines.

* Fix spellcheck pipeline.

Author: fmabroukmsft

specification/cognitiveservices/resource-manager/Microsoft.CognitiveServices/cspell.yaml

@@ -2,6 +2,7 @@ import:
   - ../../../../cspell.yaml
 words:
   - ADLS
+  - agentic
   - Eloqua
   - Hdfs
   - Informix