Update xmc4800 requirement from 0.4.0 to 0.5.0 (#121)

Updates the requirements on [xmc4800](https://github.com/xmc-rs/xmc4800) to permit the latest version.
- [Release notes](https://github.com/xmc-rs/xmc4800/releases)
- [Commits](https://github.com/xmc-rs/xmc4800/commits)

---
updated-dependencies:
- dependency-name: xmc4800
  dependency-type: direct:production
...

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

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

Cargo.toml

@@ -30,7 +30,7 @@ xmc4300 = { version = "0.5.0", optional = true }
 xmc4400 = { version = "0.5.0", optional = true }
 xmc4500 = { version = "0.4.0", optional = true }
 xmc4700 = { version = "0.5.0", optional = true }
-xmc4800 = { version = "0.4.0", optional = true }
+xmc4800 = { version = "0.5.0", optional = true }
 cortex-m = "0.7.3"
 nb = "1.0.0"
 cortex-m-rt = "0.6.12"