Mettre à jour 'stl/Calibration_cross/README.md'

stl/Calibration_cross/README.md

@@ -19,8 +19,8 @@
 ```
 
 https://www.thingiverse.com/thing:2484766
-Calibration cross by lukeskymuh is licensed under the Creative Commons - Attribution license.
-http://creativecommons.org/licenses/by/3.0/
+
+Calibration cross by lukeskymuh is licensed under the [Creative Commons - Attribution license.](http://creativecommons.org/licenses/by/3.0/)
 
 # Summary