chore(deps): bump ajv, @google/adk and @toolbox-sdk/adk

Bumps [ajv](https://github.com/ajv-validator/ajv) to 8.18.0 and updates ancestor dependencies [ajv](https://github.com/ajv-validator/ajv), [@google/adk](https://github.com/google/adk-js) and [@toolbox-sdk/adk](https://github.com/googleapis/mcp-toolbox-sdk-js). These dependencies need to be updated together.


Updates `ajv` from 6.12.6 to 8.18.0
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](https://github.com/ajv-validator/ajv/compare/v6.12.6...v8.18.0)

Updates `@google/adk` from 0.1.3 to 0.3.0
- [Release notes](https://github.com/google/adk-js/releases)
- [Changelog](https://github.com/google/adk-js/blob/main/release-please-config.json)
- [Commits](https://github.com/google/adk-js/compare/v0.1.3...adk-v0.3.0)

Updates `@toolbox-sdk/adk` from 0.1.5 to 0.2.1
- [Release notes](https://github.com/googleapis/mcp-toolbox-sdk-js/releases)
- [Changelog](https://github.com/googleapis/mcp-toolbox-sdk-js/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/mcp-toolbox-sdk-js/compare/adk-v0.1.5...adk-v0.2.1)

---
updated-dependencies:
- dependency-name: ajv
  dependency-version: 8.18.0
  dependency-type: indirect
- dependency-name: "@google/adk"
  dependency-version: 0.3.0
  dependency-type: direct:production
- dependency-name: "@toolbox-sdk/adk"
  dependency-version: 0.2.1
  dependency-type: direct:production
...

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

docs/en/getting-started/quickstart/js/adk/package.json

@@ -11,7 +11,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@google/adk": "^0.1.3",
-    "@toolbox-sdk/adk": "^0.1.5"
+    "@google/adk": "^0.3.0",
+    "@toolbox-sdk/adk": "^0.2.1"
   }
 }