man: insmod documentation fix

Add comma between lsmod(8) and modinfo(8)

Signed-off-by: Lukas Berk <lberk@redhat.com>
diff --git a/man/insmod.xml b/man/insmod.xml
index db0672c..8ff4e20 100644
--- a/man/insmod.xml
+++ b/man/insmod.xml
@@ -75,7 +75,7 @@
       </citerefentry>,
       <citerefentry>
         <refentrytitle>lsmod</refentrytitle><manvolnum>8</manvolnum>
-      </citerefentry>
+      </citerefentry>,
       <citerefentry>
         <refentrytitle>modinfo</refentrytitle><manvolnum>8</manvolnum>
       </citerefentry>