docs: a bit more in docstring examples

Author: machow

docs/get-started/docstring-examples.qmd

@@ -107,6 +107,8 @@ def f() -> int:
 
 ```
 
+See the [numpydoc Returns specification](https://numpydoc.readthedocs.io/en/latest/format.html#returns) for more on the general form of the Returns section.
+
 
 ## Using interlinks in docstrings