Update usvg requirement from 0.15 to 0.16

Updates the requirements on [usvg](https://github.com/RazrFalcon/resvg) to permit the latest version.
- [Release notes](https://github.com/RazrFalcon/resvg/releases)
- [Changelog](https://github.com/RazrFalcon/resvg/blob/master/CHANGELOG.md)
- [Commits](linebender/resvg@v0.15.0...v0.16.0)

---
updated-dependencies:
- dependency-name: usvg
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Cargo.toml

@@ -11,6 +11,6 @@ serde = { version = "1.0.118", features = ["derive"] }
 serde_json = "1.0.60"
 image = "0.23.12"
 resvg = "0.15.0"
-usvg = { version = "0.15", default-features = false }
+usvg = { version = "0.16", default-features = false }
 tiny-skia = "0.5.1"
 handlebars = "4.0.0"