document path paramater behaviour for same path across different methods

Author: bruc3mackenzi3

website/content/guide/request.md

@@ -71,6 +71,10 @@ e.GET("/users/:name", func(c echo.Context) error {
 curl http://localhost:1323/users/Joe
 ```
 
+Note that when registering the same path for multiple methods, the path parameter
+name needs to be the same.  All paths will be registered using the name from the
+first path.
+
 ### Binding Data
 
 Also binding of request data to native Go structs and variables is supported.