bump doc module - challenger - OAuth 2.0-based authentication service that validates user can receive messages at a certain address

commit 66a6aedbd2f324b314b958010dea81a0ba41ff06
parent b9091f384469d3098c0e95f5a896cdca0f6cb080
Author: Christian Grothoff <christian@grothoff.org>
Date:   Wed,  8 Oct 2025 20:42:22 +0200

bump doc module

	challenger OAuth 2.0-based authentication service that validates user can receive messages at a certain address
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