message: Update ISSUE_TEMPLATE
  1. Fixes grammar error.
  2. Adds GraphQL Playground HTML.
  3. Adds sentence about providing gif/image.
diff: -#### This issue pertains to:
  +#### This issue pertains to the following package(s):
  - [ ] GraphQL Playground - Electron App
  +- [ ] GraphQL Playground HTML
  - [ ] GraphQL Playground
  - [ ] GraphQL Playground Middleware
  #### What OS and OS version are you experiencing the issue(s) on?
  -#### What version of graphql-playground(-electron/-middleware) are you experience the issue(s) on?
  +#### What version of graphql-playground(-electron/-middleware) are you experiencing the issue(s) on?
  #### What is the expected behavior?
  #### What steps may we take to reproduce the behavior?
  +_Please provide a gif or image of the issue for a quicker response/fix._
  