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
blas/ext/base/gfill	$\color{green}350/350$ $\color{green}+100.00\%$	$\color{green}41/41$ $\color{green}+100.00\%$	$\color{green}3/3$ $\color{green}+100.00\%$	$\color{green}350/350$ $\color{green}+100.00\%$
number/float64/base/set-high-word	$\color{green}252/252$ $\color{green}+100.00\%$	$\color{green}8/8$ $\color{green}+100.00\%$	$\color{green}2/2$ $\color{green}+100.00\%$	$\color{green}252/252$ $\color{green}+100.00\%$
random/array/cosine	$\color{green}488/488$ $\color{green}+100.00\%$	$\color{green}53/53$ $\color{green}+100.00\%$	$\color{green}11/11$ $\color{green}+100.00\%$	$\color{green}488/488$ $\color{green}+100.00\%$
random/array/uniform	$\color{green}489/489$ $\color{green}+100.00\%$	$\color{green}52/52$ $\color{green}+100.00\%$	$\color{green}11/11$ $\color{green}+100.00\%$	$\color{green}489/489$ $\color{green}+100.00\%$

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