nixos/woodpecker: fix documentation links (#427705)

nixos/modules/services/continuous-integration/woodpecker/agents.nix

···
             DOCKER_HOST = "unix:///run/podman/podman.sock";
           }
         '';
-        description = "woodpecker-agent config environment variables, for other options read the [documentation](https://woodpecker-ci.org/docs/administration/agent-config)";
+        description = "woodpecker-agent config environment variables, for other options read the [documentation](https://woodpecker-ci.org/docs/administration/configuration/agent)";
       };
 
       extraGroups = lib.mkOption {

nixos/modules/services/continuous-integration/woodpecker/server.nix

···
             WOODPECKER_GITEA_URL = "https://git.example.com";
           }
         '';
-        description = "woodpecker-server config environment variables, for other options read the [documentation](https://woodpecker-ci.org/docs/administration/server-config)";
+        description = "woodpecker-server config environment variables, for other options read the [documentation](https://woodpecker-ci.org/docs/administration/configuration/server)";
       };
       environmentFile = lib.mkOption {
         type = with lib.types; coercedTo path (f: [ f ]) (listOf path);