test: fix test-http2-multiheaders-raw

Arguments of deepStrictEqual were in incorrect order. Swap
first argument (actual value) with the second one (expected
value) to make the order correct.

PR-URL: https://github.com/nodejs/node/pull/27885
Reviewed-By: Ujjwal Sharma <usharma1998@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Anto Aravinth <anto.aravinth.cse@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>

test/parallel/test-http2-multiheaders-raw.js

@@ -34,7 +34,7 @@ server.on('stream', common.mustCall((stream, headers, flags, rawHeaders) => {
     'foo, bar, baz'
   ];
 
-  assert.deepStrictEqual(expected, rawHeaders);
+  assert.deepStrictEqual(rawHeaders, expected);
   stream.respond(src);
   stream.end();
 }));