Bump solana-geyser-plugin-interface from 1.16.14 to 1.16.15

Bumps [solana-geyser-plugin-interface](https://github.com/solana-labs/solana) from 1.16.14 to 1.16.15.
- [Release notes](https://github.com/solana-labs/solana/releases)
- [Changelog](https://github.com/solana-labs/solana/blob/master/CHANGELOG.md)
- [Commits](solana-labs/solana@v1.16.14...v1.16.15)

---
updated-dependencies:
- dependency-name: solana-geyser-plugin-interface
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]