docs: Reference cov_mark crate instead of test_utils/mark

Seems this was switched over in https://github.com/rust-lang/rust-analyzer/issues/7922
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Edward Jones 2024-07-26 22:49:11 -03:00 committed by GitHub
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@ -408,7 +408,7 @@ It has a much richer vocabulary of types than `ide`, but the basic testing setup
For comparisons, we use the `expect` crate for snapshot testing.
To test various analysis corner cases and avoid forgetting about old tests, we use so-called marks.
See the `marks` module in the `test_utils` crate for more.
See the [cov_mark](https://docs.rs/cov-mark/latest/cov_mark/) crate documentation for more.
**Architecture Invariant:** rust-analyzer tests do not use libcore or libstd.
All required library code must be a part of the tests.