MAINT: Bump pydata-sphinx-theme from 0.15.1 to 0.15.2

Bumps [pydata-sphinx-theme](https://github.com/pydata/pydata-sphinx-theme) from 0.15.1 to 0.15.2.
- [Release notes](https://github.com/pydata/pydata-sphinx-theme/releases)
- [Changelog](https://github.com/pydata/pydata-sphinx-theme/blob/main/RELEASE.md)
- [Commits](pydata/pydata-sphinx-theme@v0.15.1...v0.15.2)

---
updated-dependencies:
- dependency-name: pydata-sphinx-theme
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pyproject.toml

@@ -34,7 +34,7 @@ tests = [
     "pytest-cov==4.1.0",
 ]
 doc = [
-    "pydata-sphinx-theme==0.15.1",
+    "pydata-sphinx-theme==0.15.2",
     "numpydoc==1.6.0",
     "Sphinx==7.2.6",
     "sphinx-autoapi==3.0.0",