Fix recent change log entries that are past tense

Author: aiudirog

HISTORY.rst

@@ -6,8 +6,8 @@ FUTURE: TBD
 
 0.6.0: 2025-11-10
 -----------------
-- Added ``py.typed`` marker to declare this package supports typing (closes #50)
-- Added MyPy configuration in `setup.cfg` and added a MyPy job to CI
+- Add ``py.typed`` marker to declare this package supports typing (closes #50)
+- Add MyPy configuration in `setup.cfg` and added a MyPy job to CI
 
 0.5.0: 2025-09-08
 -----------------