Merge pull request #229 from Hy4ri/fix/issue-template-frontmatter

fix: remove invalid assignees field from issue template frontmatter

.github/ISSUE_TEMPLATE/bug_report.md

@@ -3,7 +3,6 @@ name: 🐛 Bug report
 description: Report a bug or unexpected behaviour
 title: '[bug] '
 labels: bug
-assignees: ''
 ---
 
 ## Describe the bug

.github/ISSUE_TEMPLATE/feature_request.md

@@ -3,7 +3,6 @@ name: ✨ Feature request
 description: Suggest an idea, enhancement, UX improvement, or refactor
 title: '[enhancement] '
 labels: enhancement
-assignees: ''
 ---
 
 ## Problem / motivation