chore(deps): update rust crate assert_cmd to v2.0.15

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
assert_cmd	dev-dependencies	patch	2.0.14 -> 2.0.15

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Release Notes

assert-rs/assert_cmd (assert_cmd)

### [`v2.0.15`](https://togithub.com/assert-rs/assert_cmd/blob/HEAD/CHANGELOG.md#2015---2024-07-25) [Compare Source](https://togithub.com/assert-rs/assert_cmd/compare/v2.0.14...v2.0.15) ##### Compatibility - MSRV is now 1.74.0

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