build: bump pypandoc from 1.14 to 1.15 in the documentation group (#3647)

* build: bump pypandoc from 1.14 to 1.15 in the documentation group

Bumps the documentation group with 1 update: [pypandoc](https://github.com/JessicaTegner/pypandoc).


Updates `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
  dependency-group: documentation
...

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

* chore: adding changelog file 3647.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/3647.dependencies.md

@@ -0,0 +1 @@
+build: bump pypandoc from 1.14 to 1.15 in the documentation group

pyproject.toml

@@ -88,7 +88,7 @@ doc = [
     "pandas==2.2.3",
     "plotly==5.24.1",
     "pyiges[full]==0.3.1",
-    "pypandoc==1.14",
+    "pypandoc==1.15",
     "pytest-sphinx==0.6.3",
     "pythreejs==2.4.2",
     "sphinx-autobuild==2024.10.3",