fix: update snapshot for defaultPreferences immutability test to reflect fontSize change

- Adjusted the snapshot to ensure consistency with the updated defaultPreferences configuration, specifically retaining the fontSize property.

packages/@core/preferences/__tests__/__snapshots__/config.test.ts.snap

@@ -113,9 +113,9 @@ exports[`defaultPreferences immutability test > should not modify the config obj
     "colorPrimary": "hsl(212 100% 45%)",
     "colorSuccess": "hsl(144 57% 58%)",
     "colorWarning": "hsl(42 84% 61%)",
+    "fontSize": 16,
     "mode": "dark",
     "radius": "0.5",
-    "fontSize": 16,
     "semiDarkHeader": false,
     "semiDarkSidebar": false,
   },