Update repo metadata

yaohaizh · yaohaizh · commit bcfba8aada04 · 2019-08-15T14:33:39.000+08:00
diff --git a/README.md b/README.md
@@ -4,7 +4,7 @@ languages:
 - csharp
 products:
 - azure
-extentions:
+extensions:
 - services: Resource-Manager
 - platforms: dotnet
 ---
