chore(deps): update dependency sphinx-rtd-theme to v3.1.0rc2

Author: renovate[bot]

requirements-dev.txt

@@ -5,7 +5,7 @@ tox==4.33.0 ; python_version < "3.10"
 wheel==0.46.1
 Sphinx==9.0.4 ; python_version >= "3.11"
 Sphinx==7.4.7 ; python_version < "3.11"
-sphinx-rtd-theme==3.1.0rc1 ; python_version >= "3.11"
+sphinx-rtd-theme==3.1.0rc2 ; python_version >= "3.11"
 sphinx-rtd-theme==3.0.2 ; python_version < "3.11"
 pypandoc==1.16.2
 twine==6.2.0