Update numpydoc requirement from ~=1.6.0 to >=1.6,<1.10

Updates the requirements on [numpydoc](https://github.com/numpy/numpydoc) to permit the latest version.
- [Release notes](https://github.com/numpy/numpydoc/releases)
- [Changelog](https://github.com/numpy/numpydoc/blob/main/RELEASE.rst)
- [Commits](numpy/numpydoc@v1.6.0...v1.9.0)

---
updated-dependencies:
- dependency-name: numpydoc
  dependency-version: 1.9.0
  dependency-type: direct:development
...

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

Author: dependabot[bot]

pyproject.toml

@@ -42,7 +42,7 @@ dev = [
 docs = [
     "sphinx ~=7.2.6",
     "ipython ~=8.16.1",
-    "numpydoc ~=1.6.0",
+    "numpydoc >=1.6,<1.10",
     "sphinx-copybutton ~=0.5.2",
     "sphinx_rtd_theme ~=1.3.0",
 ]