Update README.md

Added a link to a site that has more info about google forms. submitting multiple fields was particularly useful.  https://docs.google.com/forms/d/1fmILMIWovOG9K2gltCtRyQSeTCEAWol467d2LWBZxYQ/formResponse?ifq&entry.179038648=Answer_1a&entry.1854028218=Answer_2a&entry.1122953457=Answer_3a&submit=Submit