fix(deps): update rust crate open-feature to 0.3

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
open-feature (source)	dependencies	minor	0.2 → 0.3

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Release Notes

open-feature/rust-sdk (open-feature)

v0.3.0

Compare Source

⚠ BREAKING CHANGES

• replace lazy_static with std::sync::OnceLock (#​127)

🐛 Bug Fixes

• deps: update rust crate darling to 0.23.0 (#​119) (596daa8)
• deps: update rust crate mockall to 0.14.0 (#​118) (aa3a6fb)

🧹 Chore

• Bump min rust version (#​125) (7f74461)
• deps: replace google-github-actions/release-please-action action with googleapis/release-please-action v4 (#​112) (44d20fb)
• deps: update actions/checkout action to v6 (#​117) (58461b8)
• update license copyright and add .cursor to gitignore (#​115) (7b975f1)

📚 Documentation

• update rust sdk release link in README (#​121) (4efe245)

🔄 Refactoring

• replace lazy_static with std::sync::OnceLock (#​127) (8d9182a)

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