docs: fixed broken electron-fiddle links in the "Tutorial - Publishing and Updating" doc (#43129)

fixed electron-fiddle build and config links

docs/tutorial/tutorial-6-publishing-updating.md

@@ -222,8 +222,8 @@ rest of our docs and happy developing! If you have questions, please stop by our
 [code-signed]: ./code-signing.md
 [discord server]: https://discord.gg/electronjs
 [electron fiddle]: https://www.electronjs.org/fiddle
-[fiddle-build]: https://github.com/electron/fiddle/blob/main/.github/workflows/build.yaml
-[fiddle-forge-config]: https://github.com/electron/fiddle/blob/main/forge.config.js
+[fiddle-build]: https://github.com/electron/fiddle/blob/main/.circleci/config.yml
+[fiddle-forge-config]: https://github.com/electron/fiddle/blob/main/forge.config.ts
 [github actions]: https://github.com/features/actions
 [github publisher]: https://www.electronforge.io/config/publishers/github
 [github releases]: https://docs.github.com/en/repositories/releasing-projects-on-github/managing-releases-in-a-repository