test: change object assign by spread operator

change object assign by spread operator in test-require-symlink.js
PR-URL: #30438
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

Author: putxe

test/parallel/test-require-symlink.js

@@ -78,7 +78,7 @@ function test() {
 
 // Also verify that symlinks works for setting preserve via env variables
 constchildEnv=spawn(node,[linkScript],{
-env: Object.assign({},process.env,{NODE_PRESERVE_SYMLINKS: '1'})
+env: { ...process.env,NODE_PRESERVE_SYMLINKS: '1'}
 });
 childEnv.on('close',function(code,signal){
 assert.strictEqual(code,0);