fix doc for LinearMap.compRight (#9997)

minor typo here. An (f : M2 -> M3) induces a linear map from (M->M2) to (M->M3). Not to (M2 -> M3).

Co-authored-by: Alex Meiburg <[email protected]>

Mathlib/Algebra/Module/LinearMap.lean

@@ -1444,7 +1444,7 @@ variable [Module R M] [Module R M₂] [Module R M₃]
 variable (f g : M →ₗ[R] M₂)
 
 /-- Composition by `f : M₂ → M₃` is a linear map from the space of linear maps `M → M₂`
-to the space of linear maps `M₂ → M₃`. -/
+to the space of linear maps `M → M₃`. -/
 def compRight (f : M₂ →ₗ[R] M₃) : (M →ₗ[R] M₂) →ₗ[R] M →ₗ[R] M₃ where
   toFun := f.comp
   map_add' _ _ := LinearMap.ext fun _ => map_add f _ _