meta: clarify recommendation for bug reproductions

Sometimes reporters link to a repo for their repro, which
not only likely takes them more time to setup, but also is less
convenient for maintainers. Setting up a repo goes against the idea of a
minimal repro, as if it was actually minimal, they would not have
bothered creating a repo.

PR-URL: #50882
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Robert Nagy <ronagy@icloud.com>
Reviewed-By: Yagiz Nizipli <yagiz.nizipli@sentry.io>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Ruy Adorno <ruyadorno@google.com>

.github/ISSUE_TEMPLATE/1-bug-report.yml

@@ -27,7 +27,11 @@ body:
   - type: textarea
     attributes:
       label: What steps will reproduce the bug?
-      description: Enter details about your bug, preferably a simple code snippet that can be run using `node` directly without installing third-party dependencies.
+      description: >
+        Enter details about your bug, preferably a simple code snippet that can
+        be run using `node` directly without installing third-party dependencies
+        or downloading code from the internet (i.e. no ZIP archive, no GitHub
+        repository, etc.).
   - type: textarea
     attributes:
       label: How often does it reproduce? Is there a required condition?