⬆️ Update pyyaml requirement from ~=6.0.2 to ~=6.0.3

Updates the requirements on [pyyaml](https://github.com/yaml/pyyaml) to permit the latest version.
- [Release notes](https://github.com/yaml/pyyaml/releases)
- [Changelog](https://github.com/yaml/pyyaml/blob/6.0.3/CHANGES)
- [Commits](yaml/pyyaml@6.0.2...6.0.3)

---
updated-dependencies:
- dependency-name: pyyaml
  dependency-version: 6.0.3
  dependency-type: direct:production
...

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

Author: dependabot[bot]

requirements.txt

@@ -1,6 +1,6 @@
 # Python packages requirements
 pyserial~=3.5          # Serial link to communicate with the display
-PyYAML~=6.0.2          # For themes files
+PyYAML~=6.0.3          # For themes files
 psutil~=7.1.0          # CPU / disk / network metrics
 pystray~=0.19.5        # Tray icon (all OS)
 babel~=2.17.0          # Date/time formatting