Update requirements

[tholzheim]

All requirements are still pinned to the versions from last year.

ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts.
dbis-exc-manager 0.2.9 requires ipython==8.4.0, but you have ipython 8.14.0 which is incompatible.
dbis-exc-manager 0.2.9 requires requests==2.27.1, but you have requests 2.31.0 which is incompatible.

dbis-exercise-manager/requirements.txt

Lines 1 to 8 in 5b8eff9

	# https://pypi.org/project/ipython/
	ipython==8.4.0
	# https://pypi.org/project/python-Levenshtein/
	python_Levenshtein==0.12.2
	# https://pypi.org/project/requests/
	requests==2.27.1
	# https://pypi.org/project/tabulate/
	tabulate==0.8.9

It might be better to loosen the version restriction and add scheduled runs of the workflows so that the library is continuously tested even if not updated see https://docs.github.com/en/actions/using-workflows/events-that-trigger-workflows#schedule