Fix reference

Author: Sparks29032

rever.xsh

@@ -12,7 +12,7 @@ $CHANGELOG_IGNORE = ['TEMPLATE.rst']
 $PUSH_TAG_REMOTE = 'git@github.com:diffpy/diffpy.utils.git'  # Repo to push tags to
 $GITHUB_ORG = 'diffpy'  # Github org for Github releases and conda-forge
 $GITHUB_REPO = 'diffpy.utils'  # Github repo for Github releases  and conda-forge
-$GHRELEASE_PREPEND = """See [CHANGELOG.md](CHANGELOG.md) for detailed release notes.
+$GHRELEASE_PREPEND = """See [CHANGELOG.rst](CHANGELOG.rst) for detailed release notes.
 
 The release is also available at [PyPI](https://pypi.org/project/diffpy.utils/) and [Conda](https://anaconda.org/conda-forge/diffpy.utils).
 """  # release message