fix(deps): update dependency sphinx-rtd-theme to v2 (#235)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

pyproject.toml

@@ -31,7 +31,7 @@ importlib-metadata = { version = ">1", markers = "python_version <= '3.8'" }
 # See https://github.com/orgs/python-poetry/discussions/4307
 
 # extras docs
-sphinx-rtd-theme = { version = "^1.0", optional = true }
+sphinx-rtd-theme = { version = "^2.0.0", optional = true }
 sphinx-tabs = { version = "^3", optional = true }
 sphinx-copybutton = { version = "^0.5.0", optional = true }
 sphinxcontrib-mermaid = { version = "^0.9.0", optional = true }