Update peps/pep-0791.rst

Author: skirpichev

peps/pep-0791.rst

@@ -180,7 +180,7 @@ As a variant, the new module can be added as a submodule of the
 or ``ntheory``.
 
 
-:external+py3.14:func:`~math.isqrt` renaming
+isqrt() renaming
 ---------------------------------------------
 
 There was a brief discussion about exposing :external+py3.14:func:`math.isqrt`