⬆️ Update sv-ttk requirement from ~=2.4.5 to ~=2.5.3

Updates the requirements on [sv-ttk](https://github.com/rdbende/Sun-Valley-ttk-theme) to permit the latest version.
- [Release notes](https://github.com/rdbende/Sun-Valley-ttk-theme/releases)
- [Commits](rdbende/Sun-Valley-ttk-theme@v2.4.5...v2.5.3)

---
updated-dependencies:
- dependency-name: sv-ttk
  dependency-type: direct:production
...

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

requirements.txt

@@ -7,7 +7,7 @@ GPUtil~=1.4.0         # Nvidia GPU
 pystray~=0.19.4       # Tray icon (all OS)
 babel~=2.12.1         # Date/time formatting
 ruamel.yaml~=0.17.32  # For configuration editor
-sv-ttk~=2.4.5         # Tk Sun Valley theme for configuration editor
+sv-ttk~=2.5.3         # Tk Sun Valley theme for configuration editor
 
 # Following packages are for AMD GPU on Linux
 # Note: you may need to manually install Cython first