Fixing typo that could break import typing on case insentive filesystems (#799)

Author: sol-loup

app/code/Meta/Sales/Controller/Checkout/Index.php

@@ -132,7 +132,7 @@ public function __construct(
         QuoteIdMaskFactory       $quoteIdMaskFactory,
         AddressFactory           $quoteAddressFactory,
         CartRepositoryInterface  $quoteRepository,
-        GuestCartitemRepository  $guestCartItemRepository,
+        GuestCartItemRepository  $guestCartItemRepository,
         CartItemInterfaceFactory $cartItemInterfaceFactory,
         GuestCouponManagement    $guestCouponManagement,
         CheckoutSession          $checkoutSession,