docs: update note

[stdlib-bot]

This PR

• updates the related packages section of READMEs to include links to related packages.

[stdlib-bot]

Coverage Report

Package	Statements	Branches	Functions	Lines
number/uint64/base/bigint2words	$\\color{red}165/168$ $\\color{green}+98.21\\%$	$\\color{green}4/4$ $\\color{green}+100.00\\%$	$\\color{red}1/2$ $\\color{green}+50.00\\%$	$\\color{red}165/168$ $\\color{green}+98.21\\%$

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