Rename "Bachelorkolloquium" to "Bachelor-Kolloquium" 
Rename "Bachelorkolloquium" to "Bachelor-Kolloquium" 

Version "Bachelor-Kolloquium" shall be used consistently
pep-dortmund/towards-a-new-website,pep-dortmund/towards-a-new-website,pep-dortmund/towards-a-new-website,pep-dortmund/towards-a-new-website