Update Rust crate similar to 2.6.0

[oxide-renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
similar	workspace.dependencies	minor	2.5.0 -> 2.6.0

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Release Notes

mitsuhiko/similar (similar)

### [`v2.6.0`](https://togithub.com/mitsuhiko/similar/blob/HEAD/CHANGELOG.md#260) [Compare Source](https://togithub.com/mitsuhiko/similar/compare/2.5.0...2.6.0) - Bump bstr dependency to 1.5. [#​69](https://togithub.com/mitsuhiko/similar/issues/69)

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