Bump vue-tsc from 1.8.5 to 1.8.15 in /spa

Bumps [vue-tsc](https://github.com/vuejs/language-tools/tree/HEAD/packages/vue-tsc) from 1.8.5 to 1.8.15.
- [Release notes](https://github.com/vuejs/language-tools/releases)
- [Changelog](https://github.com/vuejs/language-tools/blob/master/CHANGELOG.md)
- [Commits](https://github.com/vuejs/language-tools/commits/v1.8.15/packages/vue-tsc)

---
updated-dependencies:
- dependency-name: vue-tsc
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

spa/package.json

@@ -49,7 +49,7 @@
     "vite": "^4.3.9",
     "vitest": "^0.34.5",
     "vitest-localstorage-mock": "^0.0.1",
-    "vue-tsc": "^1.8.5"
+    "vue-tsc": "^1.8.15"
   },
   "eslintConfig": {
     "root": true,