Fix v1.0.3 changelog typo (#14)

Author: gschaffner

CHANGES

@@ -29,7 +29,7 @@ Release 1.0.4 (2023-01-21)
 Release 1.0.3 (2023-01-08)
 ==========================
 
-* Drop Python 3.8 and lower
+* Drop Python 3.7 and lower
 * Fix deprecation warnings from Sphinx 6.1
 
 Release 1.0.2 (2019-02-29)