CI: Ignore doxygen ghostscript error until doxygen is fixed
CI: Ignore doxygen ghostscript error until doxygen is fixed

AMICI-developer/AMICI,FFroehlich/AMICI,AMICI-developer/AMICI,AMICI-developer/AMICI,FFroehlich/AMICI,FFroehlich/AMICI,FFroehlich/AMICI,AMICI-developer/AMICI