Update foldhash requirement from 0.1 to 0.2

Updates the requirements on [foldhash](https://github.com/orlp/foldhash) to permit the latest version.
- [Commits](orlp/foldhash@v0.1.0...v0.2.0)

---
updated-dependencies:
- dependency-name: foldhash
  dependency-version: 0.2.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

crates/hash-sorted-map/benchmarks/Cargo.toml

@@ -18,6 +18,6 @@ criterion = "0.8"
 rand = "0.10"
 rustc-hash = "2"
 ahash = "0.8"
-foldhash = "0.1"
+foldhash = "0.2"
 fnv = "1"
 itertools = "0.14"