Bump once_cell from 1.17.2 to 1.18.0 in /autorust (microsoft#197)

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.17.2 to 1.18.0.
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](matklad/once_cell@v1.17.2...v1.18.0)

---
updated-dependencies:
- dependency-name: once_cell
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

autorust/Cargo.lock

@@ -24,7 +24,7 @@ path_abs = "0.5"
 comrak = "0.15"
 serde = "1.0"
 http-types = "2.12"
-once_cell = "1.17"
+once_cell = "1.18"
 syn = { version = "2.0", features = ["parsing"] }
 camino = "1.1"
 askama = "0.12"