kopia: replace meta = with lib; add changelog link

pkgs/by-name/ko/kopia/package.nix

@@ -46,11 +46,12 @@ buildGoModule rec {
     };
   };
 
-  meta = with lib; {
+  meta = {
     homepage = "https://kopia.io";
+    changelog = "https://github.com/kopia/kopia/releases/tag/v${version}";
     description = "Cross-platform backup tool with fast, incremental backups, client-side end-to-end encryption, compression and data deduplication";
     mainProgram = "kopia";
-    license = licenses.asl20;
-    maintainers = [ maintainers.bbigras ];
+    license = lib.licenses.asl20;
+    maintainers = with lib; [ maintainers.bbigras ];
   };
 }