Merge branch 'bump-quarto' into 'main'

Bump quarto version

See merge request generic-software-skills/lecture-materials!43

.gitlab-ci.yml

 variables:
-  QUARTO_VERSION: 1.3.450
+  QUARTO_VERSION: 1.4.553
 
 workflow:
   # these rules ensure that whenever there's a merge request, a "merge request pipeline" is run,