Update issue templates

Author: ccmywish

.github/ISSUE_TEMPLATE/01-Bug_Report.yml

@@ -1,7 +1,7 @@
 name: 🐞 Bug 报告
 description: 有 Bug 了吗?
-title: "[Bug] "
-labels: []
+title: ""
+labels: ['Bug']
 body:
 
   - type: markdown

.github/ISSUE_TEMPLATE/02-Target_Request.yml

@@ -1,6 +1,6 @@
-name: 🫸 我想要对 target 换源!
+name: 🔜 我想要对 target 换源!
 description: 想要对尚未支持的 target 进行换源？
-title: "[New Target] "
+title: ""
 labels: []
 body:
   - type: markdown

.github/ISSUE_TEMPLATE/03-Source_Share.yml

@@ -1,6 +1,6 @@
 name: 😋 我找到了新的可用源！
 description: 为大家分享新的可用源！
-title: "[New Source] "
+title: ""
 labels: ['源']
 body:
   - type: markdown

.github/ISSUE_TEMPLATE/04-Mirror_Share.yml

@@ -1,6 +1,6 @@
-name: 🎉 隔壁新开了个镜像站！
+name: 🎉 新开了个镜像站！
 description: 告诉我们哪里开了个新镜像站！
-title: "[New Mirror] "
+title: ""
 labels: ['镜像站']
 body:
   - type: markdown

.github/ISSUE_TEMPLATE/05-Deprecate.yml

@@ -1,7 +1,7 @@
 name: ⛓️‍💥 镜像源已失效
 description: 该镜像站已关停/该源已不再被支持
-title: "[Deprecate Mirror/Source] "
-labels: []
+title: ""
+labels: ['Deprecate']
 body:
   - type: markdown
     attributes: