build(deps): bump github.com/open-policy-agent/opa in /scripts

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 0.33.1 to 1.4.0.
- [Release notes](https://github.com/open-policy-agent/opa/releases)
- [Changelog](https://github.com/open-policy-agent/opa/blob/main/CHANGELOG.md)
- [Commits](https://github.com/open-policy-agent/opa/compare/v0.33.1...v1.4.0

)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-version: 1.4.0
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <support@github.com>