fix underline

diff --git a/doc/build/changelog/migration_09.rst b/doc/build/changelog/migration_09.rst
index 213385f595f24e50920d246b647b1b1a449d1327..e70a17fb0599fd6deab014a63755f4d8507d41e8 100644 (file)
--- a/doc/build/changelog/migration_09.rst
+++ b/doc/build/changelog/migration_09.rst
@@ -1089,7 +1089,7 @@ the ORM's versioning feature.
 .. _feature_1535:
 
 ``include_backrefs=False`` option for ``@validates``
----------------------------------------------------
+----------------------------------------------------
 
 The :func:`.validates` function now accepts an option ``enable_backrefs=False``,
 which will bypass firing the validator for the case where the event initiated