The growth equity unit of Goldman Sachs Group Inc. has invested $47.5 million in Kontakt.io, a startup that helps hospital managers make decisions about patients, beds and equipment.It’s the 39th investment in health care from the bank’s growth equity division and the deal is “a good example of what is coming down the pipe” for its portfolio, according to Christian Resch, the UK-based the Goldman partner who led the financing and will sit on Kontakt.io’s board....