vscode, vscodium: set meta.changelog (#529627)

pkgs/applications/editors/vscode/vscode.nix

@@ -113,6 +113,9 @@ buildVscode {
     '';
     homepage = "https://code.visualstudio.com/";
     downloadPage = "https://code.visualstudio.com/Updates";
+    changelog = "https://code.visualstudio.com/updates/v${
+      lib.replaceString "." "_" (lib.versions.majorMinor version)
+    }";
     license = lib.licenses.unfree;
     maintainers = with lib.maintainers; [
       eadwu

pkgs/applications/editors/vscode/vscodium.nix

@@ -79,6 +79,7 @@ buildVscode rec {
     '';
     homepage = "https://github.com/VSCodium/vscodium";
     downloadPage = "https://github.com/VSCodium/vscodium/releases";
+    changelog = "https://github.com/VSCodium/vscodium/releases/tag/${version}";
     license = lib.licenses.mit;
     sourceProvenance = with lib.sourceTypes; [ binaryNativeCode ];
     maintainers = with lib.maintainers; [