[3.13] gh-109975: Remove dangling angle bracket from 3.13.rst (GH-123589) (#123590)

(cherry picked from commit 9a32a25)

Co-authored-by: Rafael Fontenelle <rffontenelle@users.noreply.github.com>

Author: miss-islington

Doc/whatsnew/3.13.rst

@@ -953,7 +953,7 @@ io
   the :meth:`~io.IOBase.close` method with :data:`sys.unraisablehook`.
   Previously, errors were ignored silently by default,
   and only logged in :ref:`Python Development Mode <devmode>`
-  or when using a :ref:`<Python debug build <debug-build>`.
+  or when using a :ref:`Python debug build <debug-build>`.
   (Contributed by Victor Stinner in :gh:`62948`.)