feat: upgrade to teak

[HammadYousaf01]

v20.0.0 teak release

Issue https://github.com/overhangio/tutor/issues/1214

Todos before merge

• [x] Ensure changelog-entry exists for teak upgrade
• [ ] Ensure changelog exists for v20
• [ ] Ensure CI/Tests are working as expected
• [ ] Ensure teak branch is up-to-date with main (updated as of )

Merge Option

• [ ] Ensure "Merge Commit" option is used to merge the branch into release (Responsible: @DawoudSheraz/ @ahmed-arb ). This is needed to ensure the commit history when release is merged back into main