docs(e2e): correct isDroidStartupDialog detection comment

The comment claimed detection keyed off the dialog title and footer, but
the code matches the title and the "exit without trusting" option label.
Align the wording with what the function checks.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Entire-Checkpoint: 01KY77DKW5N5C2G0JCJXZJJXN0

Author: gtrrz-victor

e2e/agents/droid.go

@@ -237,7 +237,8 @@ func (d *Droid) StartSession(ctx context.Context, dir string) (Session, error) {
 // startup dialog (currently the "Trust this folder?" prompt) rather than the
 // interactive input box. The dialog renders its pre-selected option as
 // "> 1. Trust this folder", so the presence of ">" alone cannot distinguish it
-// from the real prompt — we key off the dialog title and footer instead.
+// from the real prompt — we key off the dialog title ("trust this folder") and
+// its "exit without trusting" option label instead.
 // Matching is case-insensitive to stay resilient to Droid re-casing its copy.
 func isDroidStartupDialog(content string) bool {
 	lower := strings.ToLower(content)