[MNT] Bump the python-packages group with 2 updates

Updates the requirements on [scikit-learn](https://github.com/scikit-learn/scikit-learn) and [sphinx](https://github.com/sphinx-doc/sphinx) to permit the latest version.

Updates `scikit-learn` to 1.5.2
- [Release notes](https://github.com/scikit-learn/scikit-learn/releases)
- [Commits](scikit-learn/scikit-learn@1.0...1.5.2)

Updates `sphinx` to 8.1.3
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v0.1.61611...v8.1.3)

---
updated-dependencies:
- dependency-name: scikit-learn
  dependency-type: direct:production
  dependency-group: python-packages
- dependency-name: sphinx
  dependency-type: direct:production
  dependency-group: python-packages
...

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

pyproject.toml

@@ -43,7 +43,7 @@ requires-python = ">=3.9,<3.13"
 dependencies = [
     "aeon>=0.11.0,<1.0.0",
     "tsml>=0.4.0,<0.5.0",
-    "scikit-learn>=1.0.0,<1.5.0",
+    "scikit-learn>=1.0.0,<1.6.0",
     "matplotlib",
     "gpustat",
     "psutil",
@@ -79,7 +79,7 @@ binder = [
     "jupyterlab",
 ]
 docs = [
-    "sphinx<8.1.0",
+    "sphinx<8.2.0",
     "sphinx-design",
     "sphinx-version-warning",
     "sphinx_issues",