chore: add search links to bug report template (@fehmer) (monkeytypegame#6990)

Author: fehmer

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -20,10 +20,10 @@ body:
 
   - type: checkboxes
     attributes:
-      label: Is there an existing issue for this?
-      description: Please search to see if an issue already exists for the bug you encountered.
+      label: Is there an [existing issue](https://github.com/monkeytypegame/monkeytype/issues?q=is%3Aissue) for this?
+      description: Please [search](https://github.com/monkeytypegame/monkeytype/issues?q=is%3Aissue) to see if an issue already exists for the bug you encountered.
       options:
-        - label: I have searched the existing issues
+        - label: I have [searched](https://github.com/monkeytypegame/monkeytype/issues?q=is%3Aissue) the existing open and closed issues
           required: true
 
   - type: markdown