man: fix reference to non-existing ukify parameter

The --extend parameter was removed by https://github.com/systemd/systemd/pull/34608
and a --join-profile was added instead, fix leftover reference in manpage

Follow-up for 3891d57c4f768cb648e1a85483216eadae0b101e

diff --git a/man/ukify.xml b/man/ukify.xml
index dfd74d59270da2bb0fc634ddc1dae0a6f712bc40..0a0ee4390c88341b1f483214acb30943df7cf975 100644 (file)
--- a/man/ukify.xml
+++ b/man/ukify.xml
@@ -465,7 +465,7 @@
 
           <listitem><para>A path to a UKI profile to place in an <literal>.profile</literal> section. This
           option is useful for creating multi-profile UKIs, and is typically used in combination with
-          <option>--extend=</option>, to extend the specified UKI with an additional profile.</para>
+          <option>--join-profile=</option>, to extend the specified UKI with an additional profile.</para>
 
           <xi:include href="version-info.xml" xpointer="v257"/></listitem>
         </varlistentry>