Categorize Text Analytics (#9377)

* categorize textanalytics

Author: scbedd

doc/sphinx/package_service_mapping.json

@@ -871,6 +871,11 @@
     "service_name": "Keyvault",
     "manually_generated": true
   },
+  "azure-ai-textanalytics": {
+    "category": "Client",
+    "service_name": "Text Analytics",
+    "manually_generated": true
+  },
   "azure-storage-blob": {
     "category": "Client",
     "service_name": "Storage",