Add example of new version number

Author: aclark4life

docs/internals/release-process.rst

@@ -54,7 +54,9 @@ publish a new release to PyPI:
 - Update the release notes in ``docs/releases/#.#.x.rst`` for the new version.
 
 - Run the ``Release`` workflow on GitHub Actions, providing the new (dev)
-  version number as input.
+  version number as input. E.g. ``5.3.x.dev0`` for a new development release
+  after ``5.2.x``. (Optional, as the workflow defaults to incrementing the
+  version automatically.)
 
     - First run with ``Dry Run?`` selected and check test PyPI to ensure that
       ``pip install`` works as expected.