man/systemd.unit: DefaultTimeoutStartSec= -> DefaultDeviceTimeoutSec=

for device unit job timeouts

Follow-up for #24044

(cherry picked from commit 83d373d)
(cherry picked from commit a5e5d6d)

Author: YHNdnzj

man/systemd.unit.xml

@@ -1048,7 +1048,7 @@
         specified, see
         <citerefentry><refentrytitle>systemd.time</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
         The default is <literal>infinity</literal> (job timeouts disabled), except for device units where
-        <varname>JobRunningTimeoutSec=</varname> defaults to <varname>DefaultTimeoutStartSec=</varname>.
+        <varname>JobRunningTimeoutSec=</varname> defaults to <varname>DefaultDeviceTimeoutSec=</varname>.
         </para>
 
         <para>Note: these timeouts are independent from any unit-specific timeouts (for example, the timeout