docs: update date format in removed_at_date (#70597)

removed_at_date requires YYYY-MM-DD format.

Signed-off-by: Abhijeet Kasurde <akasurde@redhat.com>

docs/docsite/rst/dev_guide/developing_modules_general_windows.rst

@@ -213,7 +213,7 @@ options set:
 - ``elements``: When ``type=list``, this sets the type of each list value, the values are the same as ``type``
 - ``no_log``: Will sanitise the input value before being returned in the ``module_invocation`` return value
 - ``removed_in_version``: States when a deprecated module option is to be removed, a warning is displayed to the end user if set
-- ``removed_at_date``: States the date when a deprecated module option will be removed, a warning is displayed to the end user if set
+- ``removed_at_date``: States the date (YYYY-MM-DD) when a deprecated module option will be removed, a warning is displayed to the end user if set
 - ``removed_from_collection``: States from which collection the deprecated module option will be removed; must be specified if one of ``removed_in_version`` and ``removed_at_date`` is specified
 - ``required``: Will fail when the module option is not set
 - ``type``: The type of the module option, if not set then it defaults to ``str``. The valid types are;