document that we now have ppc64le wheels (#13229)

Author: alex

CHANGELOG.rst

@@ -11,6 +11,7 @@ Changelog
 * **BACKWARDS INCOMPATIBLE:** Support for Python 3.7 has been removed.
 * Support for OpenSSL < 3.0 is deprecated and will be removed in the next
   release.
+* We now build ``ppc64le`` ``manylinux`` wheels and publish them to PyPI.
 * Removed the deprecated ``get_attribute_for_oid`` method on
   :class:`~cryptography.x509.CertificateSigningRequest`. Users should use
   :meth:`~cryptography.x509.Attributes.get_attribute_for_oid` instead.