repl: Fix typo that would lead ~/.guile to be used when running scripts.

This is a followup to c924e54139.

* guix/scripts/repl.scm (guix-repl)[opts]: Set 'ignore-dot-guile?', with
question mark.

guix/scripts/repl.scm

@@ -144,7 +144,7 @@ call THUNK."
                   (leave (G_ "~A: unrecognized option~%") name))
                 (lambda (arg result)
                   (append `((script . ,arg)
-                            (ignore-dot-guile . #t))
+                            (ignore-dot-guile? . #t))
                           result))
                 %default-options))