chore(deps): update dependency sphinx to v8

Author: anaconda-renovate[bot]

pyproject.toml

@@ -30,7 +30,7 @@ pytest = "^8.0.0"
 pytest-cov = "^5.0.0"
 pytest-mock = "^3.10.0"
 responses = "^0.25.0"
-sphinx = "7.1.2"
+sphinx = "8.1.3"
 sphinx-rtd-theme = "^2.0.0"
 
 [tool.black]