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: 715296b8 ("ip-address.8.in: fix BNF syntax error")
Signed-off-by: Phil Sutter <phil@nwl.cc>

man/man8/ip-address.8.in

@@ -60,7 +60,7 @@ ip-address \- protocol address management
 .IR FLAG " := "
 .RB "[ " permanent " | " dynamic " | " secondary " | " primary " | \
 [ - ] " tentative " | [ - ] " deprecated " | [ - ] " dadfailed " | "\
-temporary " ] [ " CONFFLAG-LIST " ]"
+temporary " | " CONFFLAG-LIST " ]"
 
 .ti -8
 .IR CONFFLAG-LIST " := [ "  CONFFLAG-LIST " ] " CONFFLAG