BUILD: Update sphinx-gallery requirement (#685)

Updates the requirements on [sphinx-gallery](https://github.com/sphinx-gallery/sphinx-gallery) to permit the latest version.
- [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@v0.14.0...v0.17.0)

---
updated-dependencies:
- dependency-name: sphinx-gallery
  dependency-type: direct:production
...

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

pyproject.toml

@@ -63,7 +63,7 @@ doc = [
     "sphinx-autobuild==2024.2.4; python_version == '3.8'",
     "sphinx-autobuild==2024.2.4; python_version > '3.8'",
     "sphinx-copybutton>=0.5.0,<0.6",
-    "sphinx-gallery>=0.14.0,<0.17",
+    "sphinx-gallery>=0.14.0,<0.18",
     "sphinx_design>=0.4.0,<0.7",
 ]
 full = [