[ci skip] Fix issue template head syntax

.github/ISSUE_TEMPLATE/en_bug_report.yml

@@ -1,6 +1,6 @@
 name: EN | Bug report
 description: Create a report to help us improve
-labels: 'bug'
+labels: ["bug"]
 
 body:
   - type: markdown
@@ -14,9 +14,9 @@ body:
       description: |
         Please search to see if an issue already exists for the bug you encountered.
       options:
-      - label: I have searched the existing issues
-        required: true
-  
+        - label: I have searched the existing issues
+          required: true
+
   - type: textarea
     attributes:
       label: What behaviour is observed?

.github/ISSUE_TEMPLATE/en_feature_request.yml

@@ -1,6 +1,6 @@
 name: EN | Feature request
 description: Suggest an idea for Leaf
-labels: 'enhancement'
+labels: ["enhancement"]
 
 body:
   - type: markdown

.github/ISSUE_TEMPLATE/zh_bug_report.yml

@@ -1,6 +1,6 @@
 name: CN | 问题反馈
 description: 创建一个问题反馈来帮助我们进步！
-labels: 'bug'
+labels: ["bug"]
 
 body:
   - type: markdown
@@ -14,9 +14,9 @@ body:
       description: |
         请浏览 [Issues](https://github.com/Winds-Studio/Leaf/issues)，并检查你的问题是否已被别人汇报！
       options:
-      - label: 我已经浏览过Issue，并确保汇报的不是已知问题
-        required: true
-  
+        - label: 我已经浏览过Issue，并确保汇报的不是已知问题
+          required: true
+
   - type: textarea
     attributes:
       label: 问题描述

.github/ISSUE_TEMPLATE/zh_feature_request.yml

@@ -1,6 +1,6 @@
 name: CN | 功能建议
 description: 想要一个新功能或给 Leaf 提建议？
-labels: 'enhancement'
+labels: ["enhancement"]
 
 body:
   - type: markdown