fix(deps): update dependency sphinx to v7

pyproject.toml

@@ -21,7 +21,7 @@ ipython = "*"
 ibm-cos-sdk = ">=2.13.3"
 typing-extensions = {version = "*", python = "^3.11.3", optional = true}
 # Sphinx documentation dependencies
-Sphinx = { version = "~4", optional = true }
+Sphinx = { version = "~7.3.0", optional = true }
 sphinx-autodoc-typehints = { version = "~1", optional = true }
 pydata-sphinx-theme = { version = "~0.9", optional = true }