Invalid Slack Link and Broken Learn Links

[Chuck Tessler]

Group,

  Thank you for the materials you have made available. At the moment, there appears to be a problem with the slides on f1tenth.org. Currently, none of them are accessible (I have attached a screenshot of the error for Lecture 6 [1] as an example).

  When trying to join the slack group the invitation [2] on the contact page has expired.

  Would someone be willing to update these resources?

[1] https://f1tenth-coursekit.readthedocs.io/en/latest/lectures/ModuleB/lecture06.html

[2] https://join.slack.com/t/f1tenth-teams/shared_invite/enQtMzc3ODU2ODM1NzE3LTBjMmVkMzZjZTJiNWUzZDFhZTJiODgzMjg0MTA1MDAxZTUxMzkwMDRhNTM2NzdjNDc5MTk5YTc5YmNhNTdhMTUs

Thank you,

  Dr. Tessler