Update BaseIntegrationTest.cs

Author: otvegg

exercise.tests/IntegrationTests/BaseIntegrationTest.cs

@@ -129,7 +129,7 @@ protected async Task<HttpResponseMessage> SendAuthenticatedPatchAsync<T>(string
             return await SendAuthenticatedRequestAsync(HttpMethod.Patch, endpoint, token, body);
         }
 
-        protected async Task<HttpResponseMessage> SendAuthenticatedPutAsync<T>(string endpoint, string token, T? body)
+        protected async Task<HttpResponseMessage> SendAuthenticatedPutAsync<T>(string endpoint, string token, T body)
         {
             return await SendAuthenticatedRequestAsync(HttpMethod.Put, endpoint, token, body);
         }