man: ip-address: align synopsis with help output

When fixing the BNF syntax error, I overlooked that 'ip address help'
prints a more correct synopsis. This patch aligns them.

Fixes: 715296b ("ip-address.8.in: fix BNF syntax error")
Signed-off-by: Phil Sutter <phil@nwl.cc>
diff --git a/man/man8/ip-address.8.in b/man/man8/ip-address.8.in
index f1efc43..43611b9 100644
--- a/man/man8/ip-address.8.in
+++ b/man/man8/ip-address.8.in
@@ -60,7 +60,7 @@
 .IR FLAG " := "
 .RB "[ " permanent " | " dynamic " | " secondary " | " primary " | \
 [ - ] " tentative " | [ - ] " deprecated " | [ - ] " dadfailed " | "\
-temporary " ] [ " CONFFLAG-LIST " ]"
+temporary " | " CONFFLAG-LIST " ]"
 
 .ti -8
 .IR CONFFLAG-LIST " := [ "  CONFFLAG-LIST " ] " CONFFLAG