Bump dependency vitest to v4.0.15 (#613)

| datasource | package | from   | to     |
| ---------- | ------- | ------ | ------ |
| npm        | vitest  | 4.0.14 | 4.0.15 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/TodoApp/package-lock.json

@@ -32,7 +32,7 @@
     "ts-loader": "9.5.4",
     "tsify": "5.0.4",
     "typescript": "5.9.3",
-    "vitest": "4.0.14",
+    "vitest": "4.0.15",
     "webpack": "5.103.0",
     "webpack-cli": "6.0.1"
   },