chore(deps): bump soroban-sdk

Bumps the cargo-minor-patch group with 1 update in the /contracts directory: [soroban-sdk](https://github.com/stellar/rs-soroban-sdk).


Updates `soroban-sdk` from 27.0.2 to 27.0.6
- [Release notes](https://github.com/stellar/rs-soroban-sdk/releases)
- [Commits](stellar/rs-soroban-sdk@v27.0.2...v27.0.6)

---
updated-dependencies:
- dependency-name: soroban-sdk
  dependency-version: 27.0.3
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: cargo-minor-patch
...

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Author: dependabot[bot]