Help/dev: Clarify maintainer guide step for DEVEL_CMAKE_VERSION

The previous wording could be misread as ensuring the arguments to the
call match the release version.  Clarify that one needs to remove the
call and replace it with the literal release version string.

Help/dev/maint.rst

@@ -270,8 +270,8 @@ Update ``Source/CMakeVersion.cmake`` to set the version to
   set(CMake_VERSION_PATCH 0)
   set(CMake_VERSION_RC 0)
 
-Update uses of ``DEVEL_CMAKE_VERSION`` in the source tree to mention the
-actual version number:
+Replace uses of ``DEVEL_CMAKE_VERSION`` in the source tree with
+the literal release version number string ``"$major.$minor.0"``:
 
 .. code-block:: shell