Bump the solana-updates group with 2 updates

Bumps the solana-updates group with 2 updates: [solana-curve25519](https://github.com/anza-xyz/agave) and [solana-zk-sdk](https://github.com/anza-xyz/agave).


Updates `solana-curve25519` from 2.3.7 to 2.3.8
- [Release notes](https://github.com/anza-xyz/agave/releases)
- [Changelog](https://github.com/anza-xyz/agave/blob/master/CHANGELOG.md)
- [Commits](anza-xyz/agave@v2.3.7...v2.3.8)

Updates `solana-zk-sdk` from 2.3.7 to 2.3.8
- [Release notes](https://github.com/anza-xyz/agave/releases)
- [Changelog](https://github.com/anza-xyz/agave/blob/master/CHANGELOG.md)
- [Commits](anza-xyz/agave@v2.3.7...v2.3.8)

---
updated-dependencies:
- dependency-name: solana-curve25519
  dependency-version: 2.3.8
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: solana-updates
- dependency-name: solana-zk-sdk
  dependency-version: 2.3.8
  dependency-type: indirect
  update-type: version-update:semver-patch
  dependency-group: solana-updates
...

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Author: dependabot[bot]