message: Update welcome.md
  Add TensorFlow User Group Utsunomiya into TensorFlow Communities Around the World.
diff: @@ -37,6 +37,7 @@ Asia:
  * [TensorFlow Korea (TF-KR) User Group](https://www.facebook.com/groups/TensorFlowKR/) _(Korean language)_
  * [TensorFlow User Group Tokyo](https://tfug-tokyo.connpass.com/) _(Japanese Language)_
  * [Soleil Data Dojo](https://soleildatadojo.connpass.com/) _(Japanese language)_
  +* [TensorFlow User Group Utsunomiya](https://tfug-utsunomiya.connpass.com/)
  Europe:
  