message: Update issue template to link to the Common Issues page
diff: <!-- Thanks for your contribution! To make things easier, please fill out the template below. -->
  +<!--
  +If you are submitting a bug report, please check the "Common Issues" page in the
  +documentation:
  +
  + https://vector-of-bool.github.io/docs/vscode-cmake-tools/common_issues.html
  +
  +Your issue may have an existing solution
  +-->
  +
  <!-- If you have a question/suggestion/issue that doesn't fit this template,
  feel free to delete the template and write any free text. -->
  