fix(deps): update github.com/open-policy-agent/frameworks/constraint digest to 6687ba5

[plural-renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/open-policy-agent/frameworks/constraint	require	digest	18fa1fc -> 6687ba5

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⚠ Dependency Lookup Warnings ⚠

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This PR has been generated by Renovate Bot.

[plural-renovate]

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: go.sum

Command failed: install-tool golang 1.22.5
No /opt/containerbase/tools/golang/1.22.5/bin defined - aborting