chore(deps): bump the all-dependencies group across 3 directories with 1 update

[dependabot]

Bumps the all-dependencies group with 1 update in the /scripts/stress-test directory: denoland/deno.
Bumps the all-dependencies group with 1 update in the /scripts/traffic-simulator directory: denoland/deno.
Bumps the all-dependencies group with 1 update in the /scripts/usc-audit-automation directory: denoland/deno.

Updates denoland/deno from 2.7.11 to 2.7.12

Updates denoland/deno from 2.7.11 to 2.7.12

Updates denoland/deno from 2.7.11 to 2.7.12

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[cursor]

PR Summary

Low Risk
Low risk dependency bump limited to Docker base images for scripts; behavior changes only come from the upstream Deno image update.

Overview
Updates the denoland/deno base image from 2.7.11 to 2.7.12 in the Dockerfiles for scripts/stress-test, scripts/traffic-simulator, and scripts/usc-audit-automation.

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