github: disable blank issues without an issue template

[agilgur5]

Description

• apparently there's a button you can press to skip using an issue
  template, which means some issues come in that can be low quality,
  confusing what the request is, don't list versions, etc

  • so disable this button and require a template, which will also make
    the writer think about whether their issue is a feature or bug
    • (if neither, perhaps StackOverflow, Discussions, etc is a better
      option than filing an issue)

• follows the official docs from
  https://docs.github.com/en/github/building-a-strong-community/configuring-issue-templates-for-your-repository#configuring-the-template-chooser,
  which instructs to set blank_issues_enabled to false to disable the
  button / option

Tags

#761 pointed out to me that one could click a button for a blank issue which was what led me to find these docs and this config option. Should help pare down on issues labeled with "removed issue template" more broadly

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[agilgur5]

From the website / docs:

You can customize the issue template chooser that people see when creating a new issue in your repository by adding a config.yml file to the .github/ISSUE_TEMPLATE folder

You can encourage contributors to use issue templates by setting blank_issues_enabled to false.

So seems about right to me 👍

[agilgur5]

Setting seems to be working: