Fix training-material clickable in GAT

For after the training, would be good to integrate this:
https://github.com/galaxyproject/infrastructure-playbook/commit/262b572f21aa0ab06edd4af9961afc90618a19bb

Start by reviewing the linked infrastructure-playbook commit to determine what “integrate this” refers to, then locate the affected training material and its surrounding navigation or links. Confirm the intended post-training GAT behavior with maintainers before changing anything; done means the relevant training material provides the expected clickable integration and the affected checks pass.

Written by the indexing model from the issue text.