build(deps): bump github.com/open-policy-agent/opa from 1.18.1 to 1.18.2

Bumps [github.com/open-policy-agent/opa](https://github.com/open-policy-agent/opa) from 1.18.1 to 1.18.2.
- [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/v1.18.1...v1.18.2)

---
updated-dependencies:
- dependency-name: github.com/open-policy-agent/opa
  dependency-version: 1.18.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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