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] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -28,7 +28,7 @@ glib-sys.workspace = true
 gobject-sys.workspace = true
 glib-macros.workspace = true
 rs-log = { package = "log", version = "0.4", optional = true }
-smallvec = { version = "1.13", features = ["union", "const_generics", "const_new"] }
+smallvec = { version = "1.15", features = ["union", "const_generics", "const_new"] }
 gio-sys = { workspace = true, optional = true }
 memchr = "2.7.4"