Add hint about GitHub repo to ruleset

rules.adoc

@@ -78,6 +78,11 @@ organizer of your regional RoboCupJunior competition and ask them about_ <<entry
 Unless specified otherwise, all parts of these rules are released under the
 terms of the Creative Commons Attribution-ShareAlike License.
 
+TIP: This ruleset is available at https://github.com/robocup-junior/soccer-rules/
+including a full history of changes made. During the rules development process
+new changes are also collected there as pull requests. Feedback and contributions
+are welcome there as well as on the forum (https://junior.forum.robocup.org/).
+
 [discrete]
 === Changes from the 2023 RoboCupJunior Soccer Rules
 

superteam_rules.adoc

@@ -54,6 +54,11 @@ been analyzed and are ruled here. For all other situations that do not change
 from the regular game rules, normally they have been only mentioned here as
 being the same regular game rule.**
 
+TIP: This ruleset is available at https://github.com/robocup-junior/soccer-rules/
+including a full history of changes made. During the rules development process
+new changes are also collected there as pull requests. Feedback and contributions
+are welcome there as well as on the forum (https://junior.forum.robocup.org/).
+
 [[gameplay]]
 == GAMEPLAY