fix: pr-deploy name

[danielxnj]

Problem

The file pr-deploy.yaml was renamed but was not updated in the workflow that calls it.

Changes

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

How did you test this code?

[posthog-bot]

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[greptile-apps]

PR Summary

This PR updates the deployment workflow reference in container-images-ci.yml to use the correct filename 'pr-preview-deploy.yml', aligning with the actual workflow file in the repository.

• Modified .github/workflows/container-images-ci.yml to reference the correct workflow file name for preview deployments
• Maintains existing functionality and conditions for deployment based on 'deploy' label

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