Help: Fix typo in 4.0 release notes for CPack archive generator

Help/release/4.0.rst

@@ -166,7 +166,7 @@ CTest
 CPack
 -----
 
-* The :cpack_gen:`CPack Archive Generator` learned to generated ``.tar``
+* The :cpack_gen:`CPack Archive Generator` learned to generate ``.tar``
   packages without compression.
 
 * The :cpack_gen:`CPack Archive Generator` now honors the