Update README

Author: philipp94831

README.md

@@ -213,7 +213,7 @@ The handler must be separated by `.`, e.g., `script.handler`.
 
 The lambda payload is unwrapped as named arguments to the R function to call, e.g., `{"x":1}` is unwrapped to `handler(x=1)`.
 
-The lambda function returns whatever is returned by the R function as a JSON object with `result` as a root element.
+The lambda function returns whatever is returned by the R function as a JSON object.
 
 ### Building custom layers