Fix label applied to bug report issue template (#541)

Issues from Bug report template had nonexistent bug report label applied instead of bug.

Author: diehlaws

.github/ISSUE_TEMPLATE/bug-report.md

@@ -2,7 +2,7 @@
 name: "\U0001F41B Bug report"
 about: Create a report to help us improve
 title: ''
-labels: bug report
+labels: bug
 assignees: ''
 
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