fix typo in changelog

Author: dantownsend

CHANGES.rst

@@ -4,8 +4,8 @@ Changes
 1.29.0
 ------
 
-* Fixed a bug with adding / substrating ``Integer`` columns from one another in
-  queries (thanks to @ryanvarley for this).
+* Fixed a bug with adding / subtracting  ``Integer`` columns from one another
+  in queries (thanks to @ryanvarley for this).
 * Updated the ASGI templates, and BlackSheep dependencies (thanks to @sinisaos
   for this).
 * Fixed a bug where decimal values generated by ``ModelBuilder`` could be too