man: update links to "Compatibility with SysV"

docs/sysvinit/README.in

@@ -24,4 +24,4 @@ Further reading:
         man:systemctl(1)
         man:systemd(1)
         https://0pointer.de/blog/projects/systemd-for-admins-3.html
-        https://www.freedesktop.org/wiki/Software/systemd/Incompatibilities
+        https://systemd.io/INCOMPATIBILITIES

man/systemd-sysv-generator.xml

@@ -47,8 +47,7 @@
     more details.</para>
 
     <para>Note that compatibility is quite comprehensive but not 100%, for more details see <ulink
-    url="https://www.freedesktop.org/wiki/Software/systemd/Incompatibilities">Incompatibilities with
-    SysV</ulink>.</para>
+    url="https://systemd.io/INCOMPATIBILITIES">Compatibility with SysV</ulink>.</para>
 
     <para>SysV runlevels have corresponding systemd targets
     (<filename>runlevel<replaceable>X</replaceable>.target</filename>).  The wrapper unit that is generated