Update users.yml (#8247)

* Update users.yml

The new logo can be found in this article: https://www.toptal.com/designers/logo/toptal-new-brand-and-logo

* Added toptal.png

Per https://github.com/prettier/prettier/pull/8247#issuecomment-625456927

website/data/users.yml

@@ -248,3 +248,6 @@
 - caption: ChilliCream
   image: /images/users/chillicream.svg
   infoLink: https://chillicream.com/
+- caption: Toptal
+  image: /images/users/toptal.png
+  infoLink: https://www.toptal.com