chore(deps): update docker digests

[renovate]

This PR contains the following updates:

Package	Update	Change
nginx	digest	f46cb72 → 8b1e787
public.ecr.aws/lambda/python	digest	16d7766 → 72480cc

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📥 Commits

Reviewing files that changed from the base of the PR and between 4e26bb8 and 043e098.

📒 Files selected for processing (1)

• lambda/docker-compose.yml

✅ Files skipped from review due to trivial changes (1)

• lambda/docker-compose.yml

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Walkthrough

This PR updates two pinned image digests in lambda/docker-compose.yml: the lambda-test service's AWS Lambda Python 3.12 ARM64 image digest and the mock-upstream service's Nginx Alpine image digest. No other configuration changes were made.

Poem

🐰 Digest chains updated with care,
Container pins refreshed in air,
Lambda and Nginx aligned just right,
Security patches locked up tight!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: updating Docker image digests in the docker-compose.yml file.
Description check	✅ Passed	The description is related to the changeset, providing a table of updated package digests and Renovate configuration details.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch renovate/docker-digests

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