Update sphinx-rtd-theme requirement

Updates the requirements on [sphinx-rtd-theme](https://github.com/readthedocs/sphinx_rtd_theme) to permit the latest version.
- [Changelog](https://github.com/readthedocs/sphinx_rtd_theme/blob/master/docs/changelog.rst)
- [Commits](readthedocs/sphinx_rtd_theme@2.0.0...3.0.2)

---
updated-dependencies:
- dependency-name: sphinx-rtd-theme
  dependency-type: direct:production
...

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

pyproject.toml

@@ -44,7 +44,7 @@ Discord = "https://discord.gg/TPBU2sa8Et"
 visualization = ["matplotlib"]
 test = ["pytest", "pytest-cov"]
 lint = ["isort", "ruff", "qbraid-cli"]
-docs = ["sphinx>=7.4,<8.2", "sphinx-autodoc-typehints>=1.24,<2.6", "sphinx-rtd-theme>=2.0.0,<3.0.2", "docutils<0.22", "sphinx-copybutton"]
+docs = ["sphinx>=7.4,<8.2", "sphinx-autodoc-typehints>=1.24,<2.6", "sphinx-rtd-theme>=2.0.0,<3.0.3", "docutils<0.22", "sphinx-copybutton"]
 
 [tool.setuptools_scm]
 write_to = "qbraid_algorithms/_version.py"