chore(deps): bump @google/generative-ai from 0.18.0 to 0.21.0

Bumps [@google/generative-ai](https://github.com/google/generative-ai-js) from 0.18.0 to 0.21.0.
- [Release notes](https://github.com/google/generative-ai-js/releases)
- [Changelog](https://github.com/google-gemini/generative-ai-js/blob/main/CHANGELOG.md)
- [Commits](google-gemini/generative-ai-js@v0.18.0...v0.21.0)

---
updated-dependencies:
- dependency-name: "@google/generative-ai"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -15,7 +15,7 @@
     "@astrojs/sitemap": "^3.0.5",
     "@astrojs/tailwind": "^5.1.0",
     "@builder.io/qwik": "1.5.6",
-    "@google/generative-ai": "^0.18.0",
+    "@google/generative-ai": "^0.21.0",
     "@ns/ha": "npm:@jsr/ns__ha@^0.1.2",
     "@qwikdev/astro": "^0.5.14",
     "@solid-primitives/keyed": "^1.2.0",