docs: clarify that reproductions must be public and minimal

Author: dominikg

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -18,7 +18,7 @@ body:
     id: reproduction
     attributes:
       label: Reproduction URL
-      description: A link to a repository or a fork of https://vite.new/svelte, that reproduces the issue. Reproductions must be [short, self-contained and correct](http://sscce.org/) and must not contain files or code that aren't relevant to the issue — please do NOT just paste a link to your project. Explaining how to reproduce is generally not enough. It pushes the burden of creating a reproduction project onto a small set of volunteer maintainers and isn't scalable. If no reproduction is provided, the issue will be closed.
+      description: A link to a **public** git repository or a fork of https://vite.new/svelte, with a **minimal** reproduction of the issue. Reproductions must be [short, self-contained and correct](http://sscce.org/) and must not contain files or code that aren't relevant to the issue — please do NOT just paste a link to your project. Explaining how to reproduce is generally not enough. It pushes the burden of creating a reproduction project onto a small set of volunteer maintainers and isn't scalable. If no reproduction is provided, the issue will be closed.
       placeholder: https://github.com/your/reproduction
     validations:
       required: true