Point `latest` tag @ v1.2 code

[olegpesok]

The documentation asks users to point at the latest tag, but right now that is linked to old code, which causes a warning when the action is run.

Node.js 12 actions are deprecated. Please update the following actions to use Node.js 16: Asana/create-app-attachment-github-action@latest. For more information see: https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/.

[hos-dimabutyrin]

Yes, please.
Meanwhile we switched to uses: Asana/create-app-attachment-github-action@v1.2 as temporary solution.