chore(deps): bump vitest from 1.4.0 to 1.6.1

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 1.4.0 to 1.6.1.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v1.6.1/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

backend/package.json

@@ -46,7 +46,7 @@
     "typescript": "^5.7.2",
     "unbuild": "^2.0.0",
     "vite": "^5.0.11",
-    "vitest": "^1.1.3"
+    "vitest": "^1.6.1"
   },
   "dependencies": {
     "@octokit/graphql-schema": "^14.50.0",