build(deps-dev): bump @solana/sysvars from 6.3.0 to 6.3.1 (#257)

Bumps [@solana/sysvars](https://github.com/anza-xyz/kit) from 6.3.0 to 6.3.1.
- [Release notes](https://github.com/anza-xyz/kit/releases)
- [Commits](anza-xyz/kit@v6.3.0...v6.3.1)

---
updated-dependencies:
- dependency-name: "@solana/sysvars"
  dependency-version: 6.3.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

clients/js/package.json

@@ -48,7 +48,7 @@
         "@eslint/js": "^10.0.1",
         "@solana-program/system": "^0.12.0",
         "@solana/kit": "^6.3.1",
-        "@solana/sysvars": "^6.3.0",
+        "@solana/sysvars": "^6.3.1",
         "@types/node": "^25.4.0",
         "ava": "^7.0.0",
         "eslint": "^9.39.1",