Update module github.com/opencontainers/selinux to 1.13.1 [9.1]

[amirbenun]

Summary of your changes

Update github.com/opencontainers/selinux go module.

Screenshot/Data

Related Issues

https://github.com/elastic/security/issues/7485

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added the necessary README/documentation (if appropriate)

Introducing a new rule?

• Generate rule metadata using this script
• Add relevant unit tests
• Generate relevant rule templates using this script, and open a PR in elastic/packages/cloud_security_posture

[Copilot]

Pull request overview

This PR updates the github.com/opencontainers/selinux Go module from version 1.12.0 to 1.13.1 as part of dependency maintenance.

• Updates the primary dependency github.com/opencontainers/selinux to version 1.13.1
• Updates the transitive dependency github.com/cyphar/filepath-securejoin to version 0.5.1
• Adds corresponding checksums to go.sum for the new versions

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
go.mod	Updates indirect dependencies for selinux (1.12.0→1.13.1) and filepath-securejoin (0.4.1→0.5.1)
go.sum	Adds checksums for the new dependency versions while preserving existing entries

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