Adding event link to Budapest chapter (#22)

Author: DataOmbudsman

pandas/index.html

@@ -117,7 +117,7 @@
              "lng": 23.3793578},
             {"title": "Budapest",
              "description": "PyData Budapest",
-             "url": "https://www.meetup.com/PyData-Budapest/",
+             "url": "https://www.meetup.com/PyData-Budapest/events/248026751/",
              "sponsor_image": "balabit.png",
              "sponsor_url": "https://www.balabit.com",
              "time": "3pm",