cargo: bump the patch group in /src/exercises/bare-metal/rtc with 4 updates (#2934)

Bumps the patch group in /src/exercises/bare-metal/rtc with 4 updates:
[bitflags](https://github.com/bitflags/bitflags),
[chrono](https://github.com/chronotope/chrono),
[log](https://github.com/rust-lang/log) and
[zerocopy](https://github.com/google/zerocopy).

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

Author: dependabot[bot]

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

@@ -11,10 +11,10 @@ aarch64-paging = { version = "0.10.0", default-features = false }
 aarch64-rt = "0.2.2"
 arm-gic = "0.7.1"
 arm-pl011-uart = "0.3.2"
-bitflags = "2.9.3"
-chrono = { version = "0.4.41", default-features = false }
-log = "0.4.27"
+bitflags = "2.9.4"
+chrono = { version = "0.4.42", default-features = false }
+log = "0.4.28"
 safe-mmio = "0.2.5"
 smccc = "0.2.2"
 spin = "0.10.0"
-zerocopy = "0.8.26"
+zerocopy = "0.8.27"