build(deps): bump @solana/functional from 6.5.0 to 6.6.0 (#590)

Bumps [@solana/functional](https://github.com/anza-xyz/kit) from 6.5.0 to 6.6.0.
- [Release notes](https://github.com/anza-xyz/kit/releases)
- [Commits](anza-xyz/kit@v6.5.0...v6.6.0)

---
updated-dependencies:
- dependency-name: "@solana/functional"
  dependency-version: 6.6.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

clients/js/package.json

@@ -36,7 +36,7 @@
   },
   "dependencies": {
     "@solana/addresses": "6.6.0",
-    "@solana/functional": "6.5.0",
+    "@solana/functional": "6.6.0",
     "@solana/instructions": "6.6.0",
     "@solana/instruction-plans": "6.5.0",
     "@solana/rpc-api": "6.5.0",