linux: 5.4.81 -> 5.4.83

pkgs/os-specific/linux/kernel/linux-5.4.nix

···
 with stdenv.lib;
 
 buildLinux (args // rec {
-  version = "5.4.81";
+  version = "5.4.83";
 
   # modDirVersion needs to be x.y.z, will automatically add .0 if needed
   modDirVersion = if (modDirVersionArg == null) then concatStringsSep "." (take 3 (splitVersion "${version}.0")) else modDirVersionArg;
···
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
-    sha256 = "09w4bpr3v9rzcvxics5wddabplwbpk1mynl45lh9csbjfpjbsw4l";
+    sha256 = "1ik14pfgynkn1sjhgyhgmxjvviq0mgvk0ygj76w8mplkpc5rgv5y";
   };
 } // (args.argsOverride or {}))