Fix error message for invalid timeout values

Co-authored-by: devgs <devgs@ukr.net>
Co-authored-by: Benny Baumann <BenBE@geshi.org>

ngx_http_uploadprogress_module.c

     lzcf->timeout = ngx_parse_time(&value[2], 1);
     if (lzcf->timeout == NGX_ERROR) {
         ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
-            "track_uploads \"%V\" timeout value invalid", &value[1]);
+            "track_uploads \"%V\" timeout value invalid", &value[2]);
         return NGX_CONF_ERROR;
     }