docs: update namespace table of contents

[stdlib-bot]

This PR

• updates namespace table of contents

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
ndarray	$\color{red}194710/367348$ $\color{green}+53.00%$	$\color{red}2193/2235$ $\color{green}+98.12%$	$\color{red}47/1893$ $\color{green}+2.48%$	$\color{red}194710/367348$ $\color{green}+53.00%$

The above coverage report was generated for the changes in this PR.