chore: release v0.2.8

[github-actions[bot]]

🤖 New release

• RustQuant: 0.2.7 -> 0.2.8 (✓ API compatible changes)

Changelog

0.2.8 - 2024-10-01

Added

• BarrierOption Payoff and Monte-Carlo

Fixed

• fix discount factor for Bachelier backend

Other

• Merge pull request #268 from broadhed/267-bachelier-options-pricer-issue
• Merge pull request #266 from avhz/dependabot/cargo/plotly-0.10.0
• Merge pull request #265 from avhz/dependabot/cargo/polars-0.43.1
• Merge pull request #261 from avhz/dependabot/cargo/ndarray-0.16.1
• add tests, fix impl
• Add Netherlands calendar
• monte-carlo example
• vanilla option monte-carlo
• vanilla option monte-carlo
• market data
• fix some comments

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