Fix extensions test by pinning "home" crate version

Build was failing with the following error:

```
error: rustc 1.85.0 is not supported by the following package:
  home@0.5.12 requires rustc 1.88
Either upgrade rustc or select compatible dependency versions with
`cargo update <name>@<current-ver> --precise <compatible-ver>`
where `<compatible-ver>` is the latest version supporting rustc 1.85.0
```

Author: penberg

libsql-sqlite3/test/rust_suite/Cargo.toml

@@ -15,6 +15,7 @@ tempfile = "3.3"
 wabt = "0.10.0"
 hex = "0.4.3"
 rustc-hash = "1"
+which = "=4.4.0"
 
 [features]
 default = []