bird: Add export community for cr04.

Signed-off-by: Maximilian Wilhelm <max@rfc2324.org>

bird/ff-policy.conf

@@ -63,6 +63,7 @@ define EXPORT_RESTRICT       = (65132, 100);
 define EXPORT_ONLY_AT_CR01   = (65132, 101);
 define EXPORT_ONLY_AT_CR02   = (65132, 102);
 define EXPORT_ONLY_AT_CR03   = (65132, 103);
+define EXPORT_ONLY_AT_CR04   = (65132, 104);
 define EXPORT_ONLY_AT_BBR_KT = (65132, 197);
 
 # Anycasted prefix