framework: Enable fwupd by default

Users should keep their firmware (not just BIOS) up to date.
Framework 13 Intel 11-13th Gen have some components that can't be
updated with fwupd, so some BIOS versions are better to be installed
through the EFI shell or Windows.

Signed-off-by: Daniel Schaefer <dhs@frame.work>

framework/16-inch/7040-amd/README.md

@@ -1,4 +1,14 @@
 # [Framework Laptop 16](https://frame.work/)
 
 ## Updating Firmware
-The Framework Laptop 16 uses LVFS, so it can be updated via fwupd; see https://wiki.nixos.org/wiki/Fwupd for details
+
+Everything is updateable through fwupd, so it's enabled by default.
+
+To get the latest firmware, run:
+
+```sh
+$ fwupdmgr refresh
+$ fwupdmgr update
+```
+
+- [Latest Update](https://fwupd.org/lvfs/devices/work.frame.Laptop16.Ryzen7040.BIOS.firmware)

framework/16-inch/7040-amd/default.nix

@@ -12,4 +12,6 @@
     ../../../common/cpu/amd/raphael/igpu.nix
   ];
 
+  # Everything is updateable through fwupd
+  services.fwupd.enable = true;
 }