fix error

Author: scholzhannah

Mathlib/Geometry/Manifold/VectorBundle/Basic.lean

@@ -498,7 +498,7 @@ theorem contMDiffOn (e : Trivialization F (π F E)) [MemTrivializationAtlas e] :
 
 theorem contMDiffOn_symm (e : Trivialization F (π F E)) [MemTrivializationAtlas e] :
     ContMDiffOn (IB.prod 𝓘(𝕜, F)) (IB.prod 𝓘(𝕜, F)) n e.toOpenPartialHomeomorph.symm e.target := by
-  rw [e.contMDiffOn_iff e.toOpenPartialHomeomorph.symm_mapsTo]
+  rw [e.contMDiffOn_iff e.toOpenPartialHomeomorph.mapsTo_symm]
   refine ⟨contMDiffOn_fst.congr fun x hx ↦ e.proj_symm_apply hx,
     contMDiffOn_snd.congr fun x hx ↦ ?_⟩
   rw [e.apply_symm_apply hx]