Update opencv requirement from 0.90.0 to 0.91.2 (#34)

Updates the requirements on [opencv](https://github.com/twistedfall/opencv-rust) to permit the latest version.
- [Changelog](https://github.com/twistedfall/opencv-rust/blob/master/CHANGES.md)
- [Commits](twistedfall/opencv-rust@v0.90.0...v0.91.2)

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

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

Cargo.toml

@@ -16,7 +16,7 @@ clap = { version = "4.4.18", features = ["derive"], optional = true }
 env_logger = { version = "0.11.0" }
 hf-hub = { version = "0.3.2" }
 log = { version = "0.4.20" }
-opencv = { version = "0.90.0", default-features = false, features = [
+opencv = { version = "0.91.2", default-features = false, features = [
   'imgproc',
   'imgcodecs',
 ] }