chore(github): add codesandbox template to v3 bug report

.github/ISSUE_TEMPLATE/bug-report-v3.yml

@@ -44,7 +44,7 @@ body:
     id: reproduction
     attributes:
       label: Reproduction
-      description: Please provide a reproduction link. A minimal [reproduction is required](https://antfu.me/posts/why-reproductions-are-required) unless you are absolutely sure that the issue is obvious and the provided information is enough to understand the problem. If a report is vague (e.g. just a generic error message) and has no reproduction, it will receive a "needs reproduction" label. If no reproduction is provided we might close it.
+      description: Please provide a reproduction link using this template https://codesandbox.io/p/devbox/nuxt-ui3-n3sxks. A minimal [reproduction is required](https://antfu.me/posts/why-reproductions-are-required) unless you are absolutely sure that the issue is obvious and the provided information is enough to understand the problem. If a report is vague (e.g. just a generic error message) and has no reproduction, it will receive a "needs reproduction" label. If no reproduction is provided we might close it.
       placeholder: https://github.com/my/reproduction
     validations:
       required: true