Update issue template with a link to open and closed issues.

Author: mtwebster

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -5,7 +5,7 @@ body:
     attributes:
       value: |
         ### STOP! Before continuing:
-        - Please try searching for any existing report that may match the behavior you're seeing. *If you find one, add to that issue, instead of opening a new one*. Include any relevant details that may differ from the original author's.
+        - Please try searching for [existing reports](https://github.com/linuxmint/xapp/issues?q=is%3Aissue+state%3Aall) that may match the behavior you're seeing. *If you find one, add to that issue, instead of opening a new one*. Include any relevant details that may differ from the original author's.
         - Check your logs - there may be some obvious cause for your trouble - in Linux Mint you can check ~/.xsession-errors (a hidden file in your Home folder).
         - If this is a *crash*, provide information about it if possible (CoreDump file, stack trace, etc...). In Linux Mint you can check the System Reports program.
         - Have you tried rebooting?