[SendAttachment] Update path on azuredeploy.json and Deploy button

CSharp/core-SendAttachment/README.md

@@ -4,7 +4,7 @@ A sample bot that passes simple media attachments (images) to a user activity.
 
 [![Deploy to Azure][Deploy Button]][Deploy CSharp/SendAttachment]
 [Deploy Button]: https://azuredeploy.net/deploybutton.png
-[Deploy CSharp/SendAttachment]: https://azuredeploy.net?ptmpl=CSharp/SendAttachment/azuredeploy.json
+[Deploy CSharp/SendAttachment]: https://azuredeploy.net?ptmpl=CSharp/core-SendAttachment/azuredeploy.json
 
 ### Prerequisites
 

CSharp/core-SendAttachment/azuredeploy.json

@@ -39,7 +39,7 @@
     },
     "Project": {
       "type": "string",
-      "defaultValue": "CSharp/SendAttachment"
+      "defaultValue": "CSharp/core-SendAttachment"
     },
     "MicrosoftAppId": {
       "type": "string"