Add workflow to [build & diff /dist folder](https://github.com/actions/javascript-action/blob/main/.github/workflows/check-dist.yml) on PR merges to avoid not triggering a build when this [step is missing](https://github.com/cypress-io/github-action/pull/621#issuecomment-1324762808)
Add workflow to build & diff /dist folder on PR merges to avoid not triggering a build when this step is missing