docs: Update issue templates

Author: sujeongmoon

.github/ISSUE_TEMPLATE/✅-feature.md

@@ -2,8 +2,8 @@
 name: "✅ FEATURE"
 about: Feature 작업 사항을 입력해주세요
 title: "[FEATURE]"
-labels: enhancement
-assignees: happine2s
+labels: ''
+assignees: ''
 
 ---
 
@@ -17,4 +17,4 @@ assignees: happine2s
 - [ ] Todo3
 
 ## 📚 Other information
-<!-- 참고할 사항이 있다면 적어주세요 -->
+<!-- 참고할 사항이 있다면 적어주세요 -->

.github/ISSUE_TEMPLATE/🐞-bug.md

@@ -24,4 +24,4 @@ A clear and concise description of what you expected to happen.
 If applicable, add screenshots to help explain your problem.
 
 ## 🔎 Additional context
-Add any other context about the problem here.
+Add any other context about the problem here.