Improve CHANGELOG formatting
Improve CHANGELOG formatting

oscargus/jabref,oscargus/jabref,Mr-DLib/jabref,Mr-DLib/jabref,tobiasdiez/jabref,jhshinn/jabref,zellerdev/jabref,Mr-DLib/jabref,Siedlerchr/jabref,bartsch-dev/jabref,sauliusg/jabref,shitikanth/jabref,jhshinn/jabref,shitikanth/jabref,Siedlerchr/jabref,sauliusg/jabref,bartsch-dev/jabref,zellerdev/jabref,bartsch-dev/jabref,jhshinn/jabref,jhshinn/jabref,zellerdev/jabref,JabRef/jabref,bartsch-dev/jabref,sauliusg/jabref,JabRef/jabref,tobiasdiez/jabref,jhshinn/jabref,shitikanth/jabref,JabRef/jabref,Siedlerchr/jabref,oscargus/jabref,zellerdev/jabref,shitikanth/jabref,sauliusg/jabref,Mr-DLib/jabref,bartsch-dev/jabref,oscargus/jabref,zellerdev/jabref,Mr-DLib/jabref,shitikanth/jabref,Siedlerchr/jabref,JabRef/jabref,tobiasdiez/jabref,oscargus/jabref,tobiasdiez/jabref