message: docs: fix broken link in `CONTRIBUTING.md`
  ## Motivation
  The pull request template link was not pointing to the pull request template.
  ## Solution
  Give the issue template and pull request template links different names.
diff: @@ -64,7 +64,7 @@ PR that helps others avoid the problems that you encountered.
  ### Submitting a Bug Report
  When opening a new issue in the `tracing` issue tracker, users will
  -be presented with a [basic template][template] that should be filled in. If you
  +be presented with a [basic template][issue-template] that should be filled in. If you
  believe that you have uncovered a bug, please fill out this form, following the
  template to the best of your ability. Do not worry if you cannot answer every
  detail, just fill in what you can.
  @@ -80,7 +80,7 @@ cases should be limited, as much as possible, to using only Tokio APIs.
  See [How to create a Minimal, Complete, and Verifiable example][mcve].
  [mcve]: https://stackoverflow.com/help/mcve
  -[template]: .github/ISSUE_TEMPLATE/bug_report.md
  +[issue-template]: .github/ISSUE_TEMPLATE/bug_report.md
  ### Triaging a Bug Report
  @@ -275,10 +275,10 @@ Refs: #453, #154
  ### Opening the Pull Request
  From within GitHub, opening a new Pull Request will present you with a
  -[template] that should be filled out. Please try to do your best at filling out
  +[pull-request-template] that should be filled out. Please try to do your best at filling out
  the details, but feel free to skip parts if you're not sure what to put.
  -[template]: .github/PULL_REQUEST_TEMPLATE.md
  +[pull-request-template]: .github/PULL_REQUEST_TEMPLATE.md
  ### Discuss and update
  