fix: typo

Author: bzp2010

src/ngx_http_apisix_module.h

@@ -70,5 +70,5 @@ char * ngx_http_apisix_error_log_init(ngx_conf_t *cf);
 char * ngx_http_apisix_error_log_request_id(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
 
 ngx_int_t ngx_http_apisix_set_upstream_pass_trailers(ngx_http_request_t *r, int on);
-ngx_int_t ngx_http_apisix_is_upstream_pass_trailers(ngx_http_request_t *r)
+ngx_int_t ngx_http_apisix_is_upstream_pass_trailers(ngx_http_request_t *r);
 #endif /* _NGX_HTTP_APISIX_H_INCLUDED_ */