test: fix name of variable in inspector-cli test

PR-URL: #38869
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: tniessen

test/fixtures/inspector-cli/cjs/index.js

@@ -1,5 +1,5 @@
-const fourty = 40;
+const forty = 40;
 const { add } = require('./other');
 
-const sum = add(fourty, 2);
+const sum = add(forty, 2);
 module.exports = sum;