change styles of "bibl" and "bibl-long"

Change the styles to fit this MR: eupt-textapi!21 (merged)

assigned to @tillmann.doenicke

created branch 27-change-styles-of-bibl-and-bibl-long to address this issue

mentioned in merge request !24 (merged)

mentioned in commit a1c001bb

closed with merge request !24 (merged)