Fix typo in schema, fix ballista yard

config/buildingsLibrary.json

@@ -251,7 +251,7 @@
 	
 	// Section 4 - buildings that now have dedicated mechanics
 	"ballistaYard": {
-		"blacksmith" : "ballista"
+		"warMachine" : "ballista"
 	},
 	
 	"thievesGuild" : {