test: fix strictEqual arguments order

PR-URL: nodejs#23956
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Franziska Hinkelmann <franziska.hinkelmann@gmail.com>

test/parallel/test-http2-write-empty-string.js

@@ -25,15 +25,15 @@ server.listen(0, common.mustCall(function() {
   let res = '';
 
   req.on('response', common.mustCall(function(headers) {
-    assert.strictEqual(200, headers[':status']);
+    assert.strictEqual(headers[':status'], 200);
   }));
 
   req.on('data', (chunk) => {
     res += chunk;
   });
 
   req.on('end', common.mustCall(function() {
-    assert.strictEqual('1\n2\n3\n', res);
+    assert.strictEqual(res, '1\n2\n3\n');
     client.close();
   }));