fix(rust/cardano-chain-follower): Bump version to v0.0.6

[saibatizoku]

Description

Bump cardano-chain-follower version to 0.0.6.

Breaking Changes

Describe any breaking changes and the impact.

Screenshots

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Related Pull Requests

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e.g., #123, #456

Please confirm the following checks

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream module