Bump @google/generative-ai from 0.19.0 to 0.21.0

Bumps [@google/generative-ai](https://github.com/google/generative-ai-js) from 0.19.0 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/deprecated-generative-ai-js@v0.19.0...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]>

Author: dependabot[bot]

package-lock.json

@@ -5,7 +5,7 @@
   "version": "1.0.0-beta",
   "dependencies": {
     "@discordjs/builders": "^1.9.0",
-    "@google/generative-ai": "^0.19.0",
+    "@google/generative-ai": "^0.21.0",
     "better-sqlite3": "^9.3.0",
     "config.json": "^0.0.4",
     "discord.js": "^14.16.2",