Fix wrong path to file

Author: yasulab

README.md

@@ -29,7 +29,7 @@
 - Theme:「ORION」(Version: 3.2.4)
 - Author: [Design Plus](http://design-plus1.com/tcd-w/)
 - 利用規約: [https://design-plus1.com/tcd-w/license_standard](https://design-plus1.com/tcd-w/license_standard)
-- 購入記録: [coderdojo-japan/decadojo/img/orion_purchase_license.png](https://github.com/coderdojo-japan/decadojo/blob/master/img/ORION_PURCHASE_LISENCE.png)
+- 購入記録: [coderdojo-japan/decadojo/img/orion_purchase_license.png](https://github.com/coderdojo-japan/decadojo/blob/master/img/orion_purchase_license.png)
 
 ### Other Asset files