test: fix argument order in assertion

The first argument is the actual value, the second argument is the
expected value.

PR-URL: #40842
Fixes: #40277
Reviewed-By: Robert Nagy <[email protected]>
Reviewed-By: Adrian Estrada <[email protected]>

Author: lpinca

test/parallel/test-http2-pipe-named-pipe.js

@@ -28,8 +28,8 @@ server.on('stream', common.mustCall((stream) => {
   }));
 
   dest.on('finish', common.mustCall(() => {
-    assert.strictEqual(fs.readFileSync(loc).length,
-                       fs.readFileSync(fn).length);
+    assert.strictEqual(fs.readFileSync(fn).length,
+                       fs.readFileSync(loc).length);
   }));
 }));