Revert "Disable non-working cleanup_pr workflow"
Revert "Disable non-working cleanup_pr workflow"

This reverts commit 5d539edda443aac36aab27abba3a15d9536eedc0.

sauliusg/jabref,Siedlerchr/jabref,Siedlerchr/jabref,JabRef/jabref,Siedlerchr/jabref,sauliusg/jabref,JabRef/jabref,sauliusg/jabref,JabRef/jabref,JabRef/jabref,Siedlerchr/jabref,sauliusg/jabref