fix(deps): update rust crate which to v7

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
which	dependencies	major	6.0 -> 7.0

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Release Notes

harryfei/which-rs (which)

v7.0.0

Compare Source

• Add support to WhichConfig for a user provided closure that will be called whenever a nonfatal error occurs.
  This technically breaks a few APIs due to the need to add more generics and lifetimes. Most code will compile
  without changes.

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