build(deps): bump smallvec from 1.14.0 to 1.15.0

Bumps [smallvec](https://github.com/servo/rust-smallvec) from 1.14.0 to 1.15.0.
- [Release notes](https://github.com/servo/rust-smallvec/releases)
- [Commits](servo/rust-smallvec@v1.14.0...v1.15.0)

---
updated-dependencies:
- dependency-name: smallvec
  dependency-version: 1.15.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Cargo.lock

@@ -11,7 +11,7 @@ include = ["LICENSE", "README.md", "number-line-ranges.svg", "src/**"]
 [dependencies]
 proptest = { version = "1.6.0", optional = true }
 serde = { version = "1.0.219", features = ["derive"], optional = true }
-smallvec = { version = "1.14.0", features = ["union"] }
+smallvec = { version = "1.15.0", features = ["union"] }
 
 [features]
 serde = ["dep:serde", "smallvec/serde"]