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

Cargo.toml

@@ -48,6 +48,7 @@ rusqlite = { package = "libsql-rusqlite", path = "vendored/rusqlite", version =
 hyper = { version = "0.14" }
 tower = { version = "0.4.13" }
 zerocopy = { version = "0.7.32", features = ["derive", "alloc"] }
+which = "=4.4.0"
 
 [profile.release]
 codegen-units = 1

libsql-sqlite3/test/rust_suite/Cargo.toml

@@ -5,6 +5,9 @@ edition = "2021"
 
 [workspace]
 
+[workspace.dependencies]
+which = "=4.4.0"
+
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dev-dependencies]