chore: update bug-report-for-version-2-x.md

- add label so it is properly classified

Author: fzipi

.github/ISSUE_TEMPLATE/bug-report-for-version-2-x.md

@@ -2,7 +2,7 @@
 name: Bug report for version 2.x
 about: Create a report to help us improve
 title: ''
-labels: ''
+labels: '2.x'
 assignees: ''
 
 ---