Merge pull request #17284 from bangerth/topic

Use 'topic' instead of 'module' in the documentation.

diff --cc doc/doxygen/headers/exceptions.h
Simple merge

diff --cc include/deal.II/distributed/tria.h
Simple merge

diff --cc include/deal.II/grid/tria.h
Simple merge

diff --cc include/deal.II/hp/collection.h
Simple merge