fix: Broken release workflow

[arpit-jn]

Changes

Fixes the release workflow that was broken when the RL scanner was added (PR #198). The publish pipeline was failing due to missing permissions and incorrect trigger configuration.

• publish.yml: Added pull_request: closed trigger to enable auto-release on merged release PRs. Changed contents: read to contents: write to fix AWS OIDC authentication for the RL scanner. Removed unused workflow_dispatch branch input.
• rl-scanner.yml: Updated actions/checkout from v4 to v6, removed hardcoded ref and fetch-depth overrides.
• ruby-release.yml: Updated actions/checkout from v4 to v6, removed hardcoded ref override.

References

• PR that introduced the regression: Adding Reversing Lab Scanner #198

Testing

CI workflow changes validated by triggering the publish workflow after merge.

• This change adds unit test coverage
• This change has been tested on the latest version of the platform/language or why not — CI workflow changes, not applicable for unit testing

Checklist

• I have read the Auth0 contribution guidelines
• I have read the Auth0 Code of Conduct
• All existing and new tests complete without errors
• All code quality tools/guidelines in the CONTRIBUTING documentation have been run/followed

[kishore7snehil]

LGTM!