Add link to troubleshooting guide

(kudos to @tghosth)

.github/ISSUE_TEMPLATE/bug-report.md

@@ -12,6 +12,8 @@ assignees: ''
 To expedite issue processing please search open and closed issues before submitting a new one.
 Existing issues often contain information about workarounds, resolution, or progress updates.
 
+Please also make sure to check the official [Troubleshooting guide](https://pwning.owasp-juice.shop/appendix/troubleshooting.html) before opening a bug report.
+
 🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅🔅-->
 
 # :bug: Bug report