Update bug_report.md

Author: willmcgugan

.github/ISSUE_TEMPLATE/bug_report.md

@@ -9,11 +9,22 @@ assignees: ""
 - [ ] I've checked [docs](https://rich.readthedocs.io/en/latest/introduction.html) and [closed issues](https://github.com/Textualize/rich/issues?q=is%3Aissue+is%3Aclosed) for possible solutions.
 - [ ] I can't find my issue in the [FAQ](https://github.com/Textualize/rich/blob/master/FAQ.md).
 
+<!-- 
+WAIT! Is this a feature request?
+
+Rich isn't accepting new features. If it can be implemented in a third-party library, then that is what I recommend.
+
+Rich *may* accept enhancements to existing features, if they don't have a disruptive impact on the API.
+-->
+
 **Describe the bug**
 
 Edit this with a clear and concise description of what the bug.
 
-Provide a minimal code example that demonstrates the issue if you can. If the issue is visual in nature, consider posting a screenshot.
+Provide a minimal code example that demonstrates the issue if you can.
+Please ensure that your example runs without modification (don't forget imports).
+
+If the issue is visual in nature, consider posting a screenshot.
 
 **Platform**
 <details>