Sync slice/internal → master

[github-actions]

Automated PR – triggered by commit 8d821cc

---

PR-Codex overview

This PR introduces a minor update to README.md and adds a line to test.md. It modifies the test section in the README and includes a new test entry.

Detailed summary

• Added test 2 to test.md.
• Changed the text from TEST to TEST9 in README.md.

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}