Doc - Fix "Phase" terminology anchor in first-actor.md
Doc - Fix "Phase" terminology anchor in first-actor.md

The anchor points to wrong url:

https://leapp.readthedocs.io/en/latest/terminlogy.html#phase

"terminlogy" instead of "terminology"

vinzenz/prototype,vinzenz/prototype,vinzenz/prototype,leapp-to/prototype,vinzenz/prototype,leapp-to/prototype,leapp-to/prototype,leapp-to/prototype