IONOS(richdocuments): update submodule (v8.7.4)#234

bromiesTM wants to merge 1 commit intorc/ncw-4IONOS-Productivity/ncw-server:rc/ncw-4from

kh/dev/update-richdocumentsIONOS-Productivity/ncw-server:kh/dev/update-richdocumentsCopy head branch name to clipboard