Mining Rune Essence only gives Rune Essence, never Pure Essence

Created by: RedSparr0w

https://github.com/dginovker/2006rebotted/blob/fe5d71569103f18ad9279059d633d1b36cd4e5d3/2006Redone%20Server/src/redone/game/content/skills/core/Mining.java#L47

When mining Rune Essence, you only ever receive Rune Essence and never receive Pure Essence.

Note: Tested on an account with 80 mining