Base Female sprite tweaks (#77407)

## About The Pull Request

ASS STUFF HAS BEEN REMOVED BUT I STILL HATE IT

This PR tones down the proportions of the female base sprites, as
currently they have about SIX extra pixels on the ass and a random pixel
missing from the neck, which breaks some hairstyles & makes the neck
look quite stupid.
It also adds a couple pixels to the male one because theirs was so
stupidly SMALL it looked like they had no tailbone (still does, kind
of).

Here is the current sprite 

![image](https://github.com/tgstation/tgstation/assets/81964183/1bf22dd7-2b06-4632-8617-b89b3b1c8d2c)
& new sprite (only neck pixel removed)

![image](https://github.com/tgstation/tgstation/assets/81964183/b1228e01-23e0-4508-86a6-bc8e73b0fcd0)

## Why It's Good For The Game

Fixes some hairs


![image](https://github.com/tgstation/tgstation/assets/81964183/3b293cf9-2661-4358-a327-2882acb93067)


## Changelog

:cl:
image: fixes weird inconsistency on the neck and butt of the female base
sprite
/:cl: