chore: bump librgbmatrix-sys from 0.15.0 to 0.16.0

Bumps [librgbmatrix-sys](https://github.com/polyfloyd/librgbmatrix-sys) from 0.15.0 to 0.16.0.
- [Commits](polyfloyd/librgbmatrix-sys@v0.15.0...v0.16.0)

---
updated-dependencies:
- dependency-name: librgbmatrix-sys
  dependency-version: 0.16.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -21,7 +21,7 @@ rpi-led-matrix = [ "librgbmatrix-sys" ]
 byteorder = "1"
 clap = { version = "4.5", features = [ "cargo" ] }
 gpio = "0.4"
-librgbmatrix-sys = { version = "0.15", optional = true }
+librgbmatrix-sys = { version = "0.16", optional = true }
 net2 = "0.2"
 nix = { version = "0.29", features = [ "fs", "term", "net", "poll" ] }
 regex = "1"