Simplifies window title for clarity

Removes redundant elements from the window title for a cleaner
and more focused display.

This improves readability and reduces visual clutter, enhancing the
user experience.

.vscode/settings.json

@@ -20,6 +20,6 @@
     "commandCenter.border": "#e7e7e799",
     "sash.hoverBorder": "#744f92"
   },
-  "window.title": "📚 MLSysBook - ${activeEditorShort}${separator}${rootName}",
+  "window.title": "📚 MLSysBook - ${activeEditorShort}",
   "workbench.colorTheme": "Default Light+"
 }