Bug template: fix yaml syntax

Author: jrfnl

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug report
 about: Create a report to help us improve
 title: ''
-labels: 'Status: triage', 'Type: bug'
+labels: ['Status: triage', 'Type: bug']
 assignees: ''
 
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