docs: update namespace table of contents

[stdlib-bot]

This PR

• updates namespace table of contents

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
fft/base/fftpack	$\\color{red}1086/1422$ $\\color{green}+76.37\\%$	$\\color{green}11/11$ $\\color{green}+100.00\\%$	$\\color{red}0/6$ $\\color{green}+0.00\\%$	$\\color{red}1086/1422$ $\\color{green}+76.37\\%$

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