aerc: use finalAttrs pattern

pkgs/by-name/ae/aerc/package.nix

···
   nix-update-script,
 }:
 
-buildGoModule rec {
+buildGoModule (finalAttrs: {
   pname = "aerc";
   version = "0.20.1";
 
   src = fetchFromSourcehut {
     owner = "~rjarry";
     repo = "aerc";
-    rev = version;
+    rev = finalAttrs.version;
     hash = "sha256-IBTM3Ersm8yUCgiBLX8ozuvMEbfmY6eW5xvJD20UgRA=";
   };
 
···
   meta = {
     description = "Email client for your terminal";
     homepage = "https://aerc-mail.org/";
-    changelog = "https://git.sr.ht/~rjarry/aerc/tree/${version}/item/CHANGELOG.md";
+    changelog = "https://git.sr.ht/~rjarry/aerc/tree/${finalAttrs.version}/item/CHANGELOG.md";
     maintainers = with lib.maintainers; [
       defelo
       sikmir
···
     license = lib.licenses.mit;
     platforms = lib.platforms.unix;
   };
-}
+})