Lean highlight does not support `--` line comment

[cireu]

I test the Lean 4 in Shiki at https://shiki.matsu.io/

And I found Shiki cannot render the -- comment of Lean correctly.

(See the different between /- test -/ and -- comment).

[cireu]

structure Point (α : Type u) where
  mk :: (x : α) (y : α)
  deriving Repr

/- test -/
#check Point       -- a Type
#check @Point.rec  -- the eliminator
#check @Point.mk   -- the constructor
#check @Point.x    -- a projection
#check @Point.y    -- a projection

#eval Point.x (Point.mk 10 20)
#eval Point.y (Point.mk 10 20)

It seems that Github can render this correct.