message: Fix minor errors in ISSUES.md
  ?Stack Overflow? ref.: <https://github.com/tensorflow/docs/pull/406>
diff: @@ -5,5 +5,5 @@ out. 3. The issue should be related to the repo it is created in.
  **Here's why we have this policy:** We want to focus on the work that benefits
  the whole community, e.g., fixing bugs and adding features. Individual support
  -should be seeked on StackOverflow or other non-GitHub channels. It helps us to
  +should be sought on Stack Overflow or other non-GitHub channels. It helps us to
  address bugs and feature requests in a timely manner.
  