Update dependency plug_cowboy to v2.9.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
plug_cowboy (source)	prod	minor	2.7.1 → 2.9.0

---

Release Notes

elixir-plug/plug_cowboy (plug_cowboy)

v2.9.0

Compare Source

Enhancements

• Implement get_sock_data from Plug
• Require Plug v1.18+

v2.8.1

Compare Source

Security fixes

• Fix atom conversion from string (CVE-2026-32688)

v2.8.0

Compare Source

Enhancements

• Remove supported for deprecated next_protocols_advertised

v2.7.5

Compare Source

Enhancements

• Ensure path too large request errors are correctly translated

v2.7.4

Compare Source

Enhancements

• Ensure errors from Ranch are correctly translated

v2.7.3

Compare Source

Enhancements

• Ensure errors from Cowboy 2.13 are correctly translated

v2.7.2

Compare Source

Bug fixes

• Ensure crash_reason in metadata is always a tuple

---

Configuration

📅 Schedule: (UTC)

• Branch creation
  • At any time (no schedule defined)
• Automerge
  • At any time (no schedule defined)

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR was generated by Mend Renovate. View the repository job log.

[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: mix.lock

Command failed: install-tool elixir v1.20.4