⬆️ Update psutil requirement from ~=5.9.5 to ~=5.9.6

Updates the requirements on [psutil](https://github.com/giampaolo/psutil) to permit the latest version.
- [Changelog](https://github.com/giampaolo/psutil/blob/master/HISTORY.rst)
- [Commits](giampaolo/psutil@release-5.9.5...release-5.9.6)

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

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -3,7 +3,7 @@ Pillow~=10.0.1         # Image generation
 pyserial~=3.5         # Serial linl to communicate with the display
 numpy~=1.24.4         # Efficient image serialization
 PyYAML~=6.0.1         # For themes files
-psutil~=5.9.5         # CPU / disk / network metrics
+psutil~=5.9.6         # CPU / disk / network metrics
 GPUtil~=1.4.0         # Nvidia GPU
 pystray~=0.19.5       # Tray icon (all OS)
 babel~=2.13.0         # Date/time formatting