fix(typo): change Simple to Import to match the example in mind (#7)

README.md

@@ -113,7 +113,7 @@ class Example {
 ```
 
 There are more examples in the `examples/` directory. Run them with the
-`Makefile`, such as: `make run-example EXAMPLE=Simple` to run the
+`Makefile`, such as: `make run-example EXAMPLE=Import` to run the
 `ImportExample` example.
 
 # API of the `wasmer` library