test: update strictEqual arguments order

The argument order in the strictEqual check against stderr is in the
wrong order. The first argument is now the actual value and the second
argument is the expected value.

PR-URL: nodejs#23552
Reviewed-By: Gabriel Schulhof <gabriel.schulhof@intel.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

test/parallel/test-stdin-from-file.js

@@ -36,5 +36,5 @@ childProcess.exec(cmd, common.mustCall(function(err, stdout, stderr) {
 
   assert.ifError(err);
   assert.strictEqual(stdout, `hello world\r\n${string}`);
-  assert.strictEqual('', stderr);
+  assert.strictEqual(stderr, '');
 }));