Clean up references to repo as HabitRPG/habitrpg (#8742)

* Confirmed changes

* Removed bad link
This was apparantly missed in #8051

* Confirmed changes

* Fixed links to milestones

.github/CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Reporting Bugs
 
-[Please see these instructions for reporting bugs](https://github.com/HabitRPG/habitrpg/issues/2760)
+[Please see these instructions for reporting bugs](https://github.com/HabitRPG/habitica/issues/2760)
 
 # Pull Request
 

.github/ISSUE_TEMPLATE.md

@@ -4,7 +4,7 @@
 
 [//]: # (If you have a feature request, use "Help > Request a Feature", not GitHub or the Report a Bug guild.)
 
-[//]: # (For more guidelines see https://github.com/HabitRPG/habitrpg/issues/2760)
+[//]: # (For more guidelines see https://github.com/HabitRPG/habitica/issues/2760)
 
 [//]: # (Fill out relevant information - UUID is found in Settings -> API)
 ### General Info