fix error

Clash/Head_dns.yaml

@@ -3,7 +3,7 @@ socks-port: 8889
 allow-lan: true
 mode: Rule
 log-level: info
-external-controller: '127.0.0.1:6170'
+external-controller: 127.0.0.1:6170
 experimental:
   ignore-resolve-fail: true
 dns:
@@ -18,7 +18,9 @@ dns:
   fake-ip-filter:
     - '*.lan'
     - localhost.ptlogin2.qq.com
+  nameserver:
+    - https://dns.alidns.com/dns-query
+    - https://1.1.1.1/dns-query
+    - tls://dns.adguard.com:853
   fallback:
-    - 'https://dns.alidns.com/dns-query'
-    - 'https://1.1.1.1/dns-query'
-    - tls://dns.adguard.com:853
+    - tcp://1.1.1.1