Doc: Update how to cite (#1412)
Doc: Update how to cite (#1412)

(previously, only README.md was updated)
FFroehlich/AMICI,AMICI-developer/AMICI,AMICI-developer/AMICI,FFroehlich/AMICI,FFroehlich/AMICI,FFroehlich/AMICI,AMICI-developer/AMICI,AMICI-developer/AMICI