test: fix parallel/test-tls-env-extra-ca.js

fix args in final assert.strictEqual() call

PR-URL: #21647
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Minwoo Jung <minwoo@nodesource.com>

test/parallel/test-tls-env-extra-ca.js

@@ -39,6 +39,7 @@ const server = tls.createServer(options, common.mustCall(function(s) {
   });
 
   fork(__filename, { env }).on('exit', common.mustCall(function(status) {
-    assert.strictEqual(status, 0, 'client did not succeed in connecting');
+    // client did not succeed in connecting
+    assert.strictEqual(status, 0);
   }));
 }));