AspNetCore.Docs/.github/PULL_REQUEST_TEMPLATE.md

When creating a new PR, please do the following and delete this template text:

• Reference the issue number if there is one:

  Fixes #Issue_Number

  The "Fixes #nnn" syntax in the PR description causes GitHub to automatically close the issue when this PR is merged.

• Suggest reviewers if you know who should review the PR, using the GitHub Reviewers UI.