fix: update ntp time servers

Author: ryan4yin

modules/nixos/base/networking.nix

@@ -1,4 +1,4 @@
-_: {
+{
   # Network discovery, mDNS
   # With this enabled, you can access your machine at <hostname>.local
   # it's more convenient than using the IP address.
@@ -12,4 +12,10 @@ _: {
       userServices = true;
     };
   };
+
+  # Use an NTP server located in the mainland of China to synchronize the system time
+  networking.timeServers = [
+    "ntp.aliyun.com" # Aliyun NTP Server
+    "ntp.tencent.com" # Tencent NTP Server
+  ];
 }