New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/23201#discussion_r452336637

Comment:
I prefer
```
distfiles="$PYPI_SITE/F/Flask-Security/Flask-Security-${version}.tar.gz"
checksum=d61daa5f5a48f89f30f50555872bdf581b2c65804668b0313345cd7beff26432
```

Same for other packages.