gh-98239: Document that inspect.getsource() can raise TypeError (GH-101689)

(cherry picked from commit b613208)

Co-authored-by: Nikita Sobolev <[email protected]>

Author: miss-islington

Doc/library/inspect.rst

@@ -526,6 +526,8 @@ Retrieving source code
    object and the line number indicates where in the original source file the first
    line of code was found.  An :exc:`OSError` is raised if the source code cannot
    be retrieved.
+   A :exc:`TypeError` is raised if the object is a built-in module, class, or
+   function.
 
    .. versionchanged:: 3.3
       :exc:`OSError` is raised instead of :exc:`IOError`, now an alias of the
@@ -538,6 +540,8 @@ Retrieving source code
    class, method, function, traceback, frame, or code object.  The source code is
    returned as a single string.  An :exc:`OSError` is raised if the source code
    cannot be retrieved.
+   A :exc:`TypeError` is raised if the object is a built-in module, class, or
+   function.
 
    .. versionchanged:: 3.3
       :exc:`OSError` is raised instead of :exc:`IOError`, now an alias of the