fix comment in passport test

Co-Authored-By: Esben Sparre Andreasen <42067045+esben-semmle@users.noreply.github.com>

javascript/ql/test/library-tests/frameworks/Express/src/passport.js

@@ -25,5 +25,5 @@ passport.use(new twitter.Strategy({
 	callbackURL : "baz",
 	passReqToCallback : true
 }, function(req, accessToken, refreshToken, profile, done) {
-	req.body; // Tainted value! passReqToCallback is set to true. Treated similarly to the req argument from Express. 
-}));
+	req.body; // `passReqToCallback` is `true`, so `req` is assumed to be an Express request object, causing this to be a `RequestInputAccss`
+}));