build: bump the documentation group with 3 updates (#3478)

* build: bump the documentation group with 3 updates

Bumps the documentation group with 3 updates: [pypandoc](https://github.com/JessicaTegner/pypandoc), [sphinx-gallery](https://github.com/sphinx-gallery/sphinx-gallery) and [sphinx](https://github.com/sphinx-doc/sphinx).


Updates `pypandoc` from 1.13 to 1.14
- [Release notes](https://github.com/JessicaTegner/pypandoc/releases)
- [Changelog](https://github.com/JessicaTegner/pypandoc/blob/master/release.md)
- [Commits](JessicaTegner/pypandoc@v1.13...v1.14)

Updates `sphinx-gallery` from 0.17.1 to 0.18.0
- [Release notes](https://github.com/sphinx-gallery/sphinx-gallery/releases)
- [Changelog](https://github.com/sphinx-gallery/sphinx-gallery/blob/master/.github_changelog_generator)
- [Commits](sphinx-gallery/sphinx-gallery@v0.17.1...v0.18.0)

Updates `sphinx` from 8.0.2 to 8.1.0
- [Release notes](https://github.com/sphinx-doc/sphinx/releases)
- [Changelog](https://github.com/sphinx-doc/sphinx/blob/master/CHANGES.rst)
- [Commits](sphinx-doc/sphinx@v8.0.2...v8.1.0)

---
updated-dependencies:
- dependency-name: pypandoc
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: documentation
- dependency-name: sphinx-gallery
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: documentation
- dependency-name: sphinx
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: documentation
...

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

* chore: adding changelog file 3478.dependencies.md [dependabot-skip]

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: pyansys-ci-bot <[email protected]>

Author: dependabot[bot]

doc/changelog.d/3478.dependencies.md

@@ -0,0 +1 @@
+build: bump the documentation group with 3 updates

pyproject.toml

@@ -89,17 +89,17 @@ doc = [
     "pandas==2.2.3",
     "plotly==5.24.1",
     "pyiges[full]==0.3.1",
-    "pypandoc==1.13",
+    "pypandoc==1.14",
     "pytest-sphinx==0.6.3",
     "pythreejs==2.4.2",
     "sphinx-autobuild==2024.10.3",
     "sphinx-autodoc-typehints==1.25.2",
     "sphinx-copybutton==0.5.2",
     "sphinx-design==0.6.1",
-    "sphinx-gallery==0.17.1",
+    "sphinx-gallery==0.18.0",
     "sphinx-jinja==2.0.2",
     "sphinx-notfound-page==1.0.4",
-    "sphinx==8.0.2",
+    "sphinx==8.1.0",
     "sphinxcontrib-websupport==2.0.0",
     "sphinxemoji==0.3.1",
     "vtk==9.3.1",