chore: improved bug-report wording

Author: xmatthias

.github/ISSUE_TEMPLATE/bug_report.md

@@ -12,7 +12,7 @@ Have you searched for similar issues before posting it?
 If you have discovered a bug in the bot, please [search the issue tracker](https://github.com/freqtrade/freqtrade/issues?q=is%3Aissue). 
 If it hasn't been reported, please create a new issue.
 
-Please do not use bug reports to request new features.
+Please do not use the bug report template to request new features.
 -->
 
 ## Describe your environment