Add missing link to built-in exceptions documentation

Author: lzblack

Notes/03_Program_organization/03_Error_checking.md

@@ -126,7 +126,7 @@ bar()
 There are about two-dozen built-in exceptions.  Usually the name of
 the exception is indicative of what's wrong (e.g., a `ValueError` is
 raised because you supplied a bad value). This is not an
-exhaustive list. Check the documentation for more.
+exhaustive list. Check the [documentation](https://docs.python.org/3/library/exceptions.html) for more.
 
 ```python
 ArithmeticError