fix(docs)

Author: picnixz

Doc/c-api/arg.rst

@@ -627,6 +627,7 @@ Building values
       Same as ``s#``.
 
    .. _capi-py-buildvalue-format-u:
+
    ``u`` (:class:`str`) [const wchar_t \*]
       Convert a null-terminated :c:type:`wchar_t` buffer of Unicode (UTF-16 or UCS-4)
       data to a Python Unicode object.  If the Unicode buffer pointer is ``NULL``,
@@ -671,6 +672,7 @@ Building values
       Convert a C :c:expr:`long long` to a Python integer object.
 
    .. _capi-py-buildvalue-format-K:
+
    ``K`` (:class:`int`) [unsigned long long]
       Convert a C :c:expr:`unsigned long long` to a Python integer object.