docs: fix simple typo, destory -> destroy
docs: fix simple typo, destory -> destroy

There is a small typo in src/ngx_http_vhost_traffic_status_display_json.c.

Should read `destroy` rather than `destory`.

vozlt/nginx-module-vts,vozlt/nginx-module-vts,vozlt/nginx-module-vts,vozlt/nginx-module-vts