Chore: update wiki URL in issue_template (#2763)

.github/ISSUE_TEMPLATE/config.yml

@@ -2,8 +2,8 @@ blank_issues_enabled: false
 
 contact_links:
   - name: （中文）阅读 Wiki
-    url: https://github.com/Dreamacro/clash/wiki/
+    url: https://dreamacro.github.io/clash/
     about: 如果你是新手，或者想要了解 Clash 的更多信息，请阅读我们撰写的官方 Wiki
   - name: (English) Read our Wiki page
-    url: https://github.com/Dreamacro/clash/wiki/
+    url: https://dreamacro.github.io/clash/
     about: If you are new to Clash, or want to know more about Clash, please read our Wiki page