build(deps): bump sphinx-notfound-page from 1.0.2 to 1.0.4 in /_package

Bumps [sphinx-notfound-page](https://github.com/readthedocs/sphinx-notfound-page) from 1.0.2 to 1.0.4.
- [Changelog](https://github.com/readthedocs/sphinx-notfound-page/blob/main/CHANGELOG.rst)
- [Commits](readthedocs/sphinx-notfound-page@1.0.2...1.0.4)

---
updated-dependencies:
- dependency-name: sphinx-notfound-page
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

_package/pyproject.toml

@@ -48,7 +48,7 @@ doc = [
     "sphinx-autobuild==2024.4.16",
     "sphinx-autodoc-typehints==2.2.3",
     "sphinx-copybutton==0.5.2",
-    "sphinx-notfound-page==1.0.2",
+    "sphinx-notfound-page==1.0.4",
     "sphinx-gallery==0.17.0",
 ]