Rename ValidateCSRF to CSRF_PROTECTION at appsettings.json in accordance with the spec.

Author: claudiamurialdo

dotnet/test/DotNetCoreAttackMitigationTest/appsettings.json

@@ -50,7 +50,7 @@
 		"CACHE_INVALIDATION_TOKEN": "20216211291931",
 		"CORS_ALLOW_ORIGIN": "https://normal-website.com",
 		"MY_CUSTOM_PTY": "DEFAULT_VALUE",
-		"ValidateCSRF": "1"
+		"CSRF_PROTECTION": "1"
 	},
   "languages": {
     "English": {