docs: update related packages sections

[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
random/base/discrete-uniform	$\color{red}790/793$ $\color{green}+99.62%$	$\color{red}88/89$ $\color{green}+98.88%$	$\color{green}12/12$ $\color{green}+100.00%$	$\color{red}790/793$ $\color{green}+99.62%$
random/erlang	$\color{green}217/217$ $\color{green}+100.00%$	$\color{green}3/3$ $\color{green}+100.00%$	$\color{green}0/0$ $\color{green}+100.00%$	$\color{green}217/217$ $\color{green}+100.00%$
random/strided/arcsine	$\color{green}295/295$ $\color{green}+100.00%$	$\color{green}19/19$ $\color{green}+100.00%$	$\color{green}3/3$ $\color{green}+100.00%$	$\color{green}295/295$ $\color{green}+100.00%$

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