This link seems like it's stale since 2021 (#9442)

* This link seems like it's stale since 2021

* Update more/problem-sets-competitive-programming.md

Co-authored-by: Leithen <lcrider@cvent.com>

* Update problem-sets-competitive-programming.md

---------

Co-authored-by: Leithen <lcrider@cvent.com>

more/problem-sets-competitive-programming.md

@@ -69,7 +69,7 @@
 ### Data science
 
 * [AIcrowd](https://www.aicrowd.com)
-* [CodaLab](https://competitions.codalab.org)
+* [CodaLab](https://codalab.lisn.upsaclay.fr)
 * [CrowdANALYTIX](https://www.crowdanalytix.com/community)
 * [DrivenData](https://www.drivendata.org)
 * [Kaggle](https://www.kaggle.com)