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	$\color{red}208794/390432$ $\color{green}+53.48%$	$\color{red}2408/2448$ $\color{green}+98.37%$	$\color{red}48/2038$ $\color{green}+2.36%$	$\color{red}208794/390432$ $\color{green}+53.48%$

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