chore: update issue template title

Author: minagishl

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,7 +1,7 @@
 ---
 name: Bug report
 about: Create a report to help us improve
-title: ''
+title: 'bug: '
 labels: bug
 assignees: ''
 ---

.github/ISSUE_TEMPLATE/feature_report.md

@@ -1,7 +1,7 @@
 ---
 name: Feature request
 about: Suggest an idea for this project
-title: ''
+title: 'feat: '
 labels: enhancement
 assignees: ''
 ---