Pull Request Overview

This PR backports changes to fix the Linux HttpStress build on release/9.0-staging, ensuring that tests run correctly. The key changes include:

• Updating the docker-compose.yml file with a clarifying comment on the version attribute.
• Changing the pipeline demand in http.yml to target Build.Ubuntu.2204.Amd64.Open.

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/libraries/System.Net.Http/tests/StressTests/HttpStress/docker-compose.yml	Added comment to address build issues on Ubuntu 2204
eng/pipelines/libraries/stress/http.yml	Updated demand to reference the correct build image for Ubuntu 2204