chore: Prepare changelog for commitizen

Author: jaysonsantos

CHANGELOG.rst renamed to CHANGELOG.md

@@ -17,7 +17,7 @@ def read(filename):
     author="Jayson Reis",
     author_email="[email protected]",
     description="A pure python module to access memcached via its binary protocol with SASL auth support",
-    long_description="{0}\n{1}".format(read("README.rst"), read("CHANGELOG.rst")),
+    long_description="{0}\n{1}".format(read("README.rst"), read("CHANGELOG.md")),
     url="https://github.com/jaysonsantos/python-binary-memcached",
     packages=["bmemcached", "bmemcached.client"],
     classifiers=[