Fix issue template syntax error (#509)

Author: myuki

.github/ISSUE_TEMPLATE/bug_report.md

@@ -11,7 +11,7 @@ assignees: ShankarBUS
 2. It would be best to create the issue in English language.
 3. Properly follow the issue template and do not delete the template.
 🟥🟥🟥 All good? Continue with your issue :) 🟥🟥🟥
---!>
+-->
 
 **Describe the bug:**
 <!-- A clear and concise description of what the bug is. -->