fix(user): remove double "button" in talk_basics.rst (open conversations)

Agent-Logs-Url: https://github.com/nextcloud/documentation/sessions/4d390437-77f5-4c02-9a44-3bc0207a959c

Co-authored-by: skjnldsv <14975046+skjnldsv@users.noreply.github.com>

Author: Copilot

user_manual/talk/talk_basics.rst

@@ -108,7 +108,7 @@ After confirmation you will be redirected to the new conversation and can start
 View all open conversations
 ---------------------------
 
-You can view all the conversations that you can join by clicking the button next to the search field and filters button and then on ``Join open conversations.``
+You can view all the conversations that you can join by clicking the button next to the search field, then clicking ``Join open conversations``.
 
 .. image:: images/join-open-conversations.png
     :width: 400px