test: fix arguments order in assert.strictEqual

PR-URL: #24612
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Shingo Inoue <leko.noor@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>

test/parallel/test-http-default-encoding.js

@@ -54,5 +54,5 @@ server.listen(0, function() {
 });
 
 process.on('exit', () => {
-  assert.strictEqual(expected, result);
+  assert.strictEqual(result, expected);
 });