chore(deps): bump rppal from 0.14.1 to 0.22.1 (#643)

Bumps [rppal](https://github.com/golemparts/rppal) from 0.14.1 to 0.22.1.
- [Release notes](https://github.com/golemparts/rppal/releases)
- [Changelog](https://github.com/golemparts/rppal/blob/master/CHANGELOG.md)
- [Commits](https://github.com/golemparts/rppal/compare/0.14.1...0.22.1)

---
updated-dependencies:
- dependency-name: rppal
  dependency-version: 0.22.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Cargo.toml

@@ -127,7 +127,7 @@ pdf-extract = { version = "0.10", optional = true }
 
 # Raspberry Pi GPIO / Landlock (Linux only) — target-specific to avoid compile failure on macOS
 [target.'cfg(target_os = "linux")'.dependencies]
-rppal = { version = "0.14", optional = true }
+rppal = { version = "0.22", optional = true }
 landlock = { version = "0.4", optional = true }
 
 [features]