Update Rust crate rust-embed to 6.6

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
rust-embed	dependencies	minor	6.4 -> 6.6

---

Release Notes

pyros2097/rust-embed

v6.6.1

• Fix mime-guess feature not working properly #​209

v6.6.0

• sort_by_file_name() requires walkdir v2.3.2 #​206
• Add mime-guess feature to statically store mimetype #​192

v6.4.2

• Fail the proc macro if include/exclude are used without the feature #​187

v6.4.1

• Update sha2 dependency version in utils crate #​186

---

Configuration

📅 Schedule: 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 has been generated by Mend Renovate. View repository job log here.