Bump pypandoc from 1.14 to 1.15

Bumps [pypandoc](https://github.com/JessicaTegner/pypandoc) from 1.14 to 1.15.
- [Release notes](https://github.com/JessicaTegner/pypandoc/releases)
- [Changelog](https://github.com/JessicaTegner/pypandoc/blob/master/release.md)
- [Commits](JessicaTegner/pypandoc@v1.14...v1.15)

---
updated-dependencies:
- dependency-name: pypandoc
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pyproject.toml

@@ -23,7 +23,7 @@ docs = [
   'mypy==1.14.1',
   'numpydoc==1.8.0',
   'osmnx==2.0.0',
-  'pypandoc==1.14',
+  'pypandoc==1.15',
   'pytest-sphinx==0.6.3',
   'pyvista-xarray==0.1.7',
   'pyvista[all]==0.44.2',