meta: rename module to usb-storage

https://github.com/torvalds/linux/blob/v6.17/drivers/usb/storage/Kconfig#L23-L24
> To compile this driver as a module, choose M here: the
> module will be called usb-storage.

raspberry-pi/3/default.nix

@@ -9,7 +9,7 @@
     kernelPackages = lib.mkDefault pkgs.linuxKernel.packages.linux_rpi3;
     initrd.availableKernelModules = [
       "usbhid"
-      "usb_storage"
+      "usb-storage"
     ];
   };