shock drone VFX NRE

im assuming it's from when the drone attacks because it gets spammed a little bit each time it happens

```
25407 [Error  : Unity Log] NullReferenceException
Stack trace:
SS2.Components.ShockDroneVFX.FixedUpdate () (at C:/Users/natep/Documents/GitHub/Starstorm2/SS2-Project/Assets/Starstorm2/Components/ShockDroneVFX.cs:50)
```