Fix stray hash on client-server API link
This shouldn't be here, and nothing appears to need it. Removing it now because it has been noticed.
@@ -1182,7 +1182,7 @@ that are too long.
.. _`Invitation storage`: ../identity_service/unstable.html#invitation-storage
.. _`Identity Service API`: ../identity_service/unstable.html
-.. _`Client-Server API`: ../client_server/unstable.html#m-room-member
+.. _`Client-Server API`: ../client_server/unstable.html
.. _`Inviting to a room`: #inviting-to-a-room
.. _`Canonical JSON`: ../appendices.html#canonical-json
.. _`Unpadded Base64`: ../appendices.html#unpadded-base64
