cargo: bump the patch group

Bumps the patch group in /src/exercises/bare-metal/rtc with 3 updates: [chrono](https://github.com/chronotope/chrono), [log](https://github.com/rust-lang/log) and [cc](https://github.com/rust-lang/cc-rs).


Updates `chrono` from 0.4.39 to 0.4.40
- [Release notes](https://github.com/chronotope/chrono/releases)
- [Changelog](https://github.com/chronotope/chrono/blob/main/CHANGELOG.md)
- [Commits](chronotope/chrono@v0.4.39...v0.4.40)

Updates `log` from 0.4.25 to 0.4.26
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang/log/blob/master/CHANGELOG.md)
- [Commits](rust-lang/log@0.4.25...0.4.26)

Updates `cc` from 1.2.11 to 1.2.16
- [Release notes](https://github.com/rust-lang/cc-rs/releases)
- [Changelog](https://github.com/rust-lang/cc-rs/blob/main/CHANGELOG.md)
- [Commits](rust-lang/cc-rs@cc-v1.2.11...cc-v1.2.16)

---
updated-dependencies:
- dependency-name: chrono
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patch
- dependency-name: log
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patch
- dependency-name: cc
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: patch
...

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

src/exercises/bare-metal/rtc/Cargo.toml

@@ -9,10 +9,10 @@ publish = false
 [dependencies]
 arm-gic = "0.1.2"
 bitflags = "2.8.0"
-chrono = { version = "0.4.39", default-features = false }
-log = "0.4.25"
+chrono = { version = "0.4.40", default-features = false }
+log = "0.4.26"
 smccc = "0.1.1"
 spin = "0.9.8"
 
 [build-dependencies]
-cc = "1.2.11"
+cc = "1.2.16"