Update Ruleset.md

Author: nopara73

LongevityWorldCup.Documentation/Ruleset.md

@@ -29,7 +29,7 @@ Anyone interested in longevity and capable of submitting valid test results can
 #### How do I register for the competition?
 ![image](https://github.com/user-attachments/assets/38c545e9-13e5-4ba2-b2e0-d52bbf149207)
 
-Simply visit our website and follow the registration instructions.
+Simply visit our ![website](https://www.longevityworldcup.com/) and follow the registration instructions.
 
 #### Can I withdraw from the competition?
 Yes, just send us an email to `[email protected]`.