Update README with link to Passport-Instagram.

README.md

@@ -109,6 +109,7 @@ included in [Passport-Local](https://github.com/jaredhanson/passport-local).
     <tr><td><a href="https://github.com/jaredhanson/passport-foursquare">Foursquare</a></td><td>Foursquare authentication strategy.</td>
     <tr><td><a href="https://github.com/jaredhanson/passport-github">GitHub</a></td><td>GitHub authentication strategy.</td>
     <tr><td><a href="https://github.com/jaredhanson/passport-google">Google</a></td><td>Google authentication strategy.</td>
+    <tr><td><a href="https://github.com/jaredhanson/passport-instagram">Instagram</a></td><td>Instagram authentication strategy.</td>
     <tr><td><a href="https://github.com/jaredhanson/passport-linkedin">LinkedIn</a></td><td>LinkedIn authentication strategy.</td>
     <tr><td><a href="https://github.com/jaredhanson/passport-meetup">Meetup</a></td><td>Meetup authentication strategy.</td>
     <tr><td><a href="https://github.com/jaredhanson/passport-twitter">Twitter</a></td><td>Twitter authentication strategy.</td>