Fixed JSON syntax error in versions.json

Author: SebastianMC

versions.json

@@ -27,6 +27,6 @@
 	"1.6.3": "0.15.0",
 	"1.7.0": "0.15.0",
 	"1.7.1": "0.15.0",
-	"1.7.2": "0.15.0"
+	"1.7.2": "0.15.0",
 	"1.8.0": "0.15.0"
 }