systemd: 257.1 -> 257.2 (#372292)

Signed-off-by: misilelab <[e-mail]>

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

···
 let
   wantCurl = withRemote || withImportd;
 
-  version = "257.1";
+  version = "257.2";
 
   # Use the command below to update `releaseTimestamp` on every (major) version
   # change. More details in the commentary at mesonFlags.
···
     owner = "systemd";
     repo = "systemd";
     rev = "v${version}";
-    hash = "sha256-w+PBpu3XjYob2VYh8FHU4sUZaWHVO9k5g0/vIj0cTvo=";
+    hash = "sha256-A64RK+EIea98dpq8qzXld4kbDGvYsKf/vDnNtMmwSBM=";
   };
 
   # On major changes, or when otherwise required, you *must* :