chore(deps-dev): bump turbo from 2.8.13 to 2.9.6

Bumps [turbo](https://github.com/vercel/turborepo) from 2.8.13 to 2.9.6.
- [Release notes](https://github.com/vercel/turborepo/releases)
- [Changelog](https://github.com/vercel/turborepo/blob/main/RELEASE.md)
- [Commits](vercel/turborepo@v2.8.13...v2.9.6)

---
updated-dependencies:
- dependency-name: turbo
  dependency-version: 2.9.6
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package.json

@@ -84,7 +84,7 @@
     "playwright-core": "1.58.2",
     "prettier": "3.6.2",
     "semver": "^7.6.0",
-    "turbo": "2.8.13"
+    "turbo": "2.9.6"
   },
   "dependencies": {
     "@opencode-ai/plugin": "workspace:*",