add node: prefix to assert import

Author: dario-piotrowicz

test/parallel/test-cli-node-cli-manpage-env-vars.mjs

@@ -1,5 +1,5 @@
 import '../common/index.mjs';
-import assert from 'assert';
+import assert from 'node:assert';
 import { createReadStream } from 'node:fs';
 import { createInterface } from 'node:readline';
 import { resolve, join } from 'node:path';

test/parallel/test-cli-node-cli-manpage-options.mjs

@@ -3,7 +3,7 @@ import assert from 'node:assert';
 import { createReadStream, readFileSync } from 'node:fs';
 import { createInterface } from 'node:readline';
 import { resolve, join } from 'node:path';
-import { EOL } from "node:os";
+import { EOL } from 'node:os';
 
 // This test checks that all the CLI flags defined in the public CLI documentation (doc/api/cli.md)
 // are also documented in the manpage file (doc/node.1)