add usgov regions

Author: PatrickFarley

articles/ai-services/content-safety/overview.md

@@ -157,6 +157,8 @@ To use the Content Safety APIs, you must create your Azure AI Content Safety res
 | West Europe | ✅ | ✅ |✅ | |✅ | |✅ |
 | Japan East | ✅ | | | |✅ | |✅ |
 | Australia East| ✅ | ✅ | | |✅ | ✅| ✅|
+| USGov Arizona | ✅ | | | | | | |
+| USGov Virginia | ✅ | | | | | | |
 
 Feel free to [contact us](mailto:[email protected]) if you need other regions for your business.