chore(deps): update vitest and group them (#1486)

## Launch Checklist

Update vitest packages and group them in dependabot.

.github/dependabot.yml

@@ -11,6 +11,10 @@ updates:
       interval: "daily"
     open-pull-requests-limit: 20
     versioning-strategy: increase
+    groups:
+      vitest:
+        patterns:
+          - "*vitest*"
     cooldown:
       default-days: 5
       semver-major-days: 5

package.json

@@ -126,7 +126,7 @@
     "@types/string-hash": "^1.1.3",
     "@types/wicg-file-system-access": "^2023.10.7",
     "@vitejs/plugin-react": "^5.1.0",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.0.6",
     "cors": "^2.8.5",
     "cypress": "^15.5.0",
     "cypress-plugin-tab": "^1.0.5",
@@ -148,6 +148,6 @@
     "uuid": "^13.0.0",
     "vite": "^7.1.12",
     "vite-plugin-istanbul": "^7.2.0",
-    "vitest": "^4.0.5"
+    "vitest": "^4.0.6"
   }
 }