Update to Linux 7.2.

This is to pull in the drivers for the mt7927 wireless chipset in my desktop. Normally, I would keep the rest of my machines on LTS but since Linux 7 significantly changed the kernel preemption, maintaining two configs would be more trouble than it is worth.

nix/configuration/roles/firefox/default.nix

@@ -134,7 +134,7 @@
       users.talexander = {
         directories = [
           {
-            directory = ".config/mozilla";
+            directory = ".mozilla";
             user = "talexander";
             group = "talexander";
             mode = "0700";