test: fix NODE_OPTIONS feature check

The configuration variable being tested is `true` if Node.js was
compiled without support for NODE_OPTIONS.
PR-URL: #28225
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

Author: richardlau

test/sequential/test-set-http-max-http-headers.js

@@ -60,7 +60,7 @@ parsers.forEach((parser) => {
 });
 
 // Next, repeat the same checks using NODE_OPTIONS if it is supported.
-if(process.config.variables.node_without_node_options){
+if(!process.config.variables.node_without_node_options){
 constenv=Object.assign({},process.env,{
 NODE_OPTIONS: `--http-parser=${parser} --max-http-header-size=1024`
 });