Update Rust crate tokio-tungstenite to 0.28

[oxide-renovate]

This PR contains the following updates:

Package	Type	Update	Change
tokio-tungstenite	workspace.dependencies	minor	0.21 -> 0.28

---

Release Notes

snapview/tokio-tungstenite (tokio-tungstenite)

v0.28.0

Compare Source

• Update tungstenite to 0.18.0. See tungstenite release.

v0.27.0

Compare Source

• See performance updates in tungstenite-rs.

v0.26.2

Compare Source

• Update tungstenite, see changes here.

v0.26.1

Compare Source

• Update tungstenite to address an issue that might cause UB in certain cases.

v0.26.0

Compare Source

• Update tungstenite to 0.26.0 (breaking changes).

v0.25.0

Compare Source

• Update tungstenite to 0.25.0 (important updates!).

v0.24.0

• Update dependencies (TLS, tungstenite).
• Return a runtime error when WSS URLs are used without a proper TLS feature enabled.

v0.23.1

• Introduce a url feature (proxies to tungstenite/url).

v0.23.0

• Update tungstenite to 0.23.0.
• Disable default features on TLS crates.

v0.22.0

Compare Source

• Update TLS dependencies.
• Update tungstenite to match 0.22.0.

---

Configuration

📅 Schedule: Branch creation - "after 8pm,before 6am" in timezone America/Los_Angeles, Automerge - "after 8pm,before 6am" in timezone America/Los_Angeles.

🚦 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 has been generated by Renovate Bot.

[oxide-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: Cargo.lock

Command failed: cargo update --config net.git-fetch-with-cli=true --manifest-path Cargo.toml --package tokio-tungstenite@0.21.0 --precise 0.28.0
    Updating crates.io index
error: failed to select a version for the requirement `tokio-tungstenite = "^0.21"`
candidate versions found which didn't match: 0.28.0
location searched: crates.io index
required by package `propolis-client v0.1.0 (https://github.com/oxidecomputer/propolis?rev=8e9252917993e36d43dce96b4409ef151b7d4442#8e925291)`
    ... which satisfies git dependency `propolis-client` (locked to 0.1.0) of package `libfalcon v0.1.0 (/tmp/renovate/repos/github/oxidecomputer/falcon/lib)`