Fix state calculation returning incorrect mode

state.lua

@@ -52,7 +52,7 @@ local function calculate_rotating_state(player, data)
     local num = math_round(r.x * r.x + r.y * r.y + r.z * r.z) -- Squared length.
     if     num == 1 then state.mode = "face"
     elseif num == 2 then state.mode = "edge"; state.axis = state.face:cross(r)
-    elseif num == 3 then state.mode = "mirror"; degrees = 120
+    elseif num == 3 then state.mode = "corner"; degrees = 120
     end
 
     -- Sneaking causes the direction of the rotation to be inverted.