build(deps-dev): bump vitest from 2.0.5 to 2.1.9

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 2.0.5 to 2.1.9.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v2.1.9/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

packages/sdk/package.json

@@ -54,7 +54,7 @@
     "typedoc-plugin-markdown": "^4.4.1",
     "typescript": "^5.3.3",
     "viem": "^2.20.1",
-    "vitest": "^2.0.5",
+    "vitest": "^2.1.9",
     "zod": "^3.24.2"
   },
   "publishConfig": {