build: bump numpydoc from 1.8.0 to 1.9.0 in the docs-deps group (#2080)

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Author: dependabot[bot]

doc/changelog.d/2080.dependencies.md

@@ -0,0 +1 @@
+Bump numpydoc from 1.8.0 to 1.9.0 in the docs-deps group

pyproject.toml

@@ -101,7 +101,7 @@ doc = [
     "nbconvert==7.16.6",
     "nbsphinx==0.9.6",
     "notebook==7.4.3",
-    "numpydoc==1.8.0",
+    "numpydoc==1.9.0",
     "numpy==2.2.6",
     "panel==1.7.2",
     "pdf2image==1.17.0",