sites.conf: fix group of Lichtenau

extra/sites.conf

@@ -164,7 +164,7 @@
 			['%%SS'] = 'hochstift.freifunk.net/lichtenau',
 		},
 		site_select = {
-			group = 'pb_sued',
+			group = 'pb_ost',
 		},
 	},
 	{
@@ -309,4 +309,4 @@
 			group = 'uml',
 		},
 	},
-}
+}