Bump dill from 0.3.8 to 0.3.9

Bumps [dill](https://github.com/uqfoundation/dill) from 0.3.8 to 0.3.9.
- [Release notes](https://github.com/uqfoundation/dill/releases)
- [Commits](uqfoundation/dill@0.3.8...0.3.9)

---
updated-dependencies:
- dependency-name: dill
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

setup.py

@@ -31,7 +31,7 @@ def readme():
         "tensorflow_gpu": ["tensorflow-gpu>=2.4.0"],
         "test": [
             "black==24.8.0",
-            "dill==0.3.8",
+            "dill==0.3.9",
             "flake8==7.1.1",
             "isort==5.12.0",
             "pytype==2024.2.27",