swayest-workstyle: get rid of rec

Because I do not like rec.
Further, https://nix.dev/guides/best-practices.html#recursive-attribute-set-rec

Further I believe source acquisition should be detached from the derivation(s)
-- but this is an issue for another issue.

pkgs/by-name/sw/swayest-workstyle/package.nix

@@ -4,16 +4,18 @@
   fetchFromGitHub,
 }:
 
-rustPlatform.buildRustPackage rec {
+let
   pname = "swayest-workstyle";
   version = "1.3.5";
-
   src = fetchFromGitHub {
     owner = "Lyr-7D1h";
     repo = "swayest_workstyle";
     rev = version;
     hash = "sha256-Dk6rAiz7PXUfyy9fWMtSVRjaWWl66n38gTNyWKqeqkU=";
   };
+in
+rustPlatform.buildRustPackage {
+  inherit pname version src;
 
   cargoHash = "sha256-sLQPq3tyWq1TxxeFyg05qBt+KGI/vO0jLU7wJLiqcYA=";