Update test/doctool/test-apilinks.mjs

Co-authored-by: Joyee Cheung <joyeec9h3@gmail.com>

Author: flakey5

test/doctool/test-apilinks.mjs

@@ -22,11 +22,9 @@ fs.readdirSync(apilinks).forEach((fixture) => {
   fs.mkdirSync(outputPath);
 
   execFileSync(
-    'npx',
+    process.execPath,
     [
-      '--prefix',
-      docToolingDir,
-      'doc-kit',
+      path.resolve(docToolingDir, 'node_modules', '.bin', 'doc-kit'),
       'generate',
       '-t',
       'api-links',