Bump sphinx-rtd-theme from 1.2.0 to 1.3.0 in /package

Bumps [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) from 1.2.0 to 1.3.0.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@1.2.0...1.3.0)

---
updated-dependencies:
- dependency-name: sphinx-rtd-theme
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package/setup.py

@@ -55,7 +55,7 @@
             "sphinx~=5.3.0",
             "sphinx_copybutton==0.3.1",
             "sphinx-notfound-page",
-            "sphinx_rtd_theme==1.2.0",
+            "sphinx_rtd_theme==1.3.0",
             "myst-parser~=1.0.0",
         ],
     },