Fix nginx rules severity and bump opengrep 1.18.0

[DMarinhoCodacy]

No description provided.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

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[codacy-production]

Pull Request Overview

The PR updates the severity levels for NGINX retirement rules in docs/codacy-rules.yaml but fails to include the opengrep 1.18.0 version bump advertised in the title.

While Codacy quality metrics are 'up to standards', the implementation contains a logic inconsistency: the NGINX retirement rules have been upgraded to ERROR severity, yet their impact metadata remains set to MEDIUM. This discrepancy should be resolved to ensure configuration consistency. Additionally, the lack of a PR description makes it difficult to assess the necessity of these specific changes beyond the severity adjustment.

About this PR

• The PR title indicates an upgrade of opengrep to version 1.18.0, but no changes to dependency files, Dockerfiles, or CI configurations were found in the diff. Please verify if the version bump was intentionally omitted or missed during the commit.
• The PR description is empty. Providing context for why rule severities are being elevated is necessary for auditing and future maintenance.

Test suggestions

• Verify 'codacy.k8s.ingress.nginx.retirement.ingress-resource' rule uses ERROR severity
• Verify 'codacy.k8s.ingress.nginx.retirement.ingress-class' rule uses ERROR severity
• Verify 'codacy.k8s.ingress.nginx.retirement.workload' rule uses ERROR severity
• Verify opengrep version is bumped to 1.18.0 in dependency or configuration files

Prompt proposal for missing tests

Consider implementing these tests if applicable:
1. Verify 'codacy.k8s.ingress.nginx.retirement.ingress-resource' rule uses ERROR severity
2. Verify 'codacy.k8s.ingress.nginx.retirement.ingress-class' rule uses ERROR severity
3. Verify 'codacy.k8s.ingress.nginx.retirement.workload' rule uses ERROR severity
4. Verify opengrep version is bumped to 1.18.0 in dependency or configuration files

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