build(deps): bump @solana/rpc-spec from 6.8.0 to 6.9.0 (#670)

Bumps [@solana/rpc-spec](https://github.com/anza-xyz/kit) from 6.8.0 to 6.9.0.
- [Release notes](https://github.com/anza-xyz/kit/releases)
- [Commits](anza-xyz/kit@v6.8.0...v6.9.0)

---
updated-dependencies:
- dependency-name: "@solana/rpc-spec"
  dependency-version: 6.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

clients/js-legacy/package.json

@@ -45,7 +45,7 @@
     "@solana/addresses": "6.9.0",
     "@solana/prettier-config-solana": "^0.0.6",
     "@solana/rpc-api": "6.9.0",
-    "@solana/rpc-spec": "6.8.0",
+    "@solana/rpc-spec": "6.9.0",
     "@solana/spl-single-pool": "workspace:*",
     "@solana/web3.js": "^1.98.4",
     "eslint-config-prettier": "^10.1.8",

clients/js/package.json

@@ -40,7 +40,7 @@
     "@solana/instructions": "6.9.0",
     "@solana/instruction-plans": "6.9.0",
     "@solana/rpc-api": "6.9.0",
-    "@solana/rpc-spec": "6.8.0",
+    "@solana/rpc-spec": "6.9.0",
     "@solana/transaction-messages": "6.9.0"
   }
 }