Build(deps): bump the pip-deps group in /requirements with 1 update (#…

…174)

Bumps the pip-deps group in /requirements with 1 update: [sphinx-gallery](https://github.com/sphinx-gallery/sphinx-gallery).

- [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...v0.15.0)

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

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

requirements/requirements_docs.txt

@@ -7,7 +7,7 @@ pytest-sphinx==0.5.0
 sphinx-autobuild==2021.3.14
 sphinx-autodoc-typehints==1.25.2
 sphinx-copybutton==0.5.2
-sphinx-gallery==0.14.0
+sphinx-gallery==0.15.0
 sphinx-notfound-page==1.0.0
 sphinxcontrib-websupport==1.2.6
 sphinxemoji==0.2.0