Update README.md

more invitational tone about contributing PRs

README.md

@@ -4,4 +4,4 @@ https://jacksonloper.github.io/datasciencequestions/ is a collections of questio
 
 Repo holding all the questions is at https://github.com/jacksonloper/datasciencequestions.  
 
-If you have ever taken or taught a masters-or-higher data-science course, feel free to submit PRs or issues to the repo.  Please include your background when you do so I have a sense of where you're coming from.    
+If you have ever taken or taught a masters-or-higher data-science course, feel free to submit PRs or issues to the repo.  Please include your background when you do so I have a sense of where you're coming from.    **I would love to add as many questions as possible!  So if you have a question that you think intro-level masters-of-datascience students should know the answer to that seems in-scope for what is already there, please make your suggestion (as a PR)!**  If your additional question doesn't seem in-scope, perhaps submit as a new-feature issue and I'll think about enlarging the scope.