chore(first-timers-bot): quote repository option

gkatsev · web-flow · commit edb257c54479 · 2018-04-02T16:58:00.000-04:00
diff --git a/.github/first-timers.yml b/.github/first-timers.yml
@@ -1,4 +1,4 @@
-repository: video.js
+repository: 'video.js'
 labels:
   - first-timers-only
   - unclaimed
