Replace the travis build badge by badges for gh actions
Replace the travis build badge by badges for gh actions

liblouis/liblouis,liblouis/liblouis,liblouis/liblouis,hammera/liblouis,BueVest/liblouis,hammera/liblouis,hammera/liblouis,BueVest/liblouis,BueVest/liblouis,BueVest/liblouis,hammera/liblouis,hammera/liblouis,BueVest/liblouis,liblouis/liblouis,liblouis/liblouis,hammera/liblouis,BueVest/liblouis,liblouis/liblouis