Bump the dependabot group across 1 directory with 2 updates (#99)

Bump the dependabot group across 1 directory with 2 updates
Bumps the dependabot group with 2 updates in the /rust directory:
[flatbuffers](https://github.com/google/flatbuffers) and
[rand](https://github.com/rust-random/rand).


Updates `flatbuffers` from 24.12.23 to 25.1.24
- [Release notes](https://github.com/google/flatbuffers/releases)
-
[Changelog](https://github.com/google/flatbuffers/blob/master/CHANGELOG.md)
-
[Commits](google/flatbuffers@v24.12.23...v25.1.24)

Updates `rand` from 0.8.5 to 0.9.0
- [Release notes](https://github.com/rust-random/rand/releases)
-
[Changelog](https://github.com/rust-random/rand/blob/master/CHANGELOG.md)
- [Commits](rust-random/rand@0.8.5...0.9.0)

---
updated-dependencies:
- dependency-name: flatbuffers
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dependabot
- dependency-name: rand
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: dependabot
...

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

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

rust/Cargo.toml

@@ -19,12 +19,12 @@ name = "sedpack_rs"
 crate-type = ["cdylib", "rlib"]
 
 [dependencies]
-flatbuffers = "24.12"
+flatbuffers = "25.1"
 flate2 = { version = "1.0.17" }
 lz4_flex = { version = "0.11.3", default-features = false , features = ["frame"] }
 numpy = "0.23"
 pyo3 = "0.23"
-rand = "0.8"
+rand = "0.9"
 strum = "0.26.3"
 strum_macros = "0.26.4"
 yoke = { version = "0.7", features = ["derive"] }

rust/src/lib.rs

@@ -49,14 +49,13 @@ mod static_iter {
     /// - Python does not guarantee that __del__ is called right away (or at all). Thus RustIter
     ///   also implements a context manager which is guaranteed to call __exit__ and drop memory
     ///   owned by the corresponding ExampleIterator.
-    static STATIC_ITERATORS: std::sync::LazyLock<
-        std::sync::Mutex<HashMap<usize, ExampleIterator>>,
-    > = std::sync::LazyLock::new(|| std::sync::Mutex::new(HashMap::new()));
+    static STATIC_ITERATORS: std::sync::LazyLock<std::sync::Mutex<HashMap<i32, ExampleIterator>>> =
+        std::sync::LazyLock::new(|| std::sync::Mutex::new(HashMap::new()));
 
     #[pyclass]
     pub struct RustIter {
         /// Which ExampleIterator are we interacting with (unique id).
-        static_index: usize,
+        static_index: i32,
         /// Read only value. For iteration we use this object as a context manager which allows us
         /// to free resources in STATIC_ITERATORS on the call of __exit__.
         ///