iproute: 5.4.0 -> 5.5.0

"Most of the fixes have been related to single (and json) formatting.
Thank you to Aya, Jakub, Jiri, and Ron for the work to get devlink
improved." [0]

File changes (additions/removals):
None

nix path-info -S:
5.4.0 46705272
5.5.0 46726136

[0]: https://marc.info/?l=linux-netdev&m=158013364425477

pkgs/os-specific/linux/iproute/default.nix

···
 
 stdenv.mkDerivation rec {
   pname = "iproute2";
-  version = "5.4.0";
+  version = "5.5.0";
 
   src = fetchurl {
     url = "mirror://kernel/linux/utils/net/${pname}/${pname}-${version}.tar.xz";
-    sha256 = "1bl6c3af7wbgi6nqjfm32fkhqh63iphkg2g11f1srifll1ham5zy";
+    sha256 = "0ywg70f98wgfai35jl47xzpjp45a6n7crja4vc8ql85cbi1l7ids";
   };
 
   preConfigure = ''