Adjust volume of ballcatcher sound effect

[Deconimus]

The ballcatcher sound effect is excessively loud when standing too close. This is especially noticeable when wearing headphones.

I'm not sure if it's just an issue of the effect volume being too high. Compared to the PC version it sounds quite distorted which could also cause this (possibly due to downsampling). Some sound effects already employ additional filters like eq, perhaps this could help here.

Volume scaling of sounds over distance overall could possibly also benefit from some improvements. In this case here, something like clamping to a maximum value could work, so that sound effects won't get any louder starting from a certain minimum distance.

Comparison between Portal 64 and Portal PC volumes (caution: it gets pretty loud):

https://github.com/mwpenny/portal64-still-alive/assets/2451901/840b51f4-bd42-4acc-97c5-7feb048cada0

https://github.com/mwpenny/portal64-still-alive/assets/2451901/a27058cc-7514-49fb-a931-e8846e07f140