fix typo

Author: xuluze

src/sage/geometry/lattice_polytope.py

@@ -3390,8 +3390,8 @@ def index_of_max(iterable):
         PM_max = PM.with_permuted_rows_and_columns(permutations_inv[0][0].inverse(),permutations_inv[0][1].inverse())
         if check:
             for p in permutations_inv.keys():
-                permutaiton_inv[p][0] = permutaiton_inv[p][0].inverse()
-                permutaiton_inv[p][1] = permutaiton_inv[p][1].inverse()
+                permutations_inv[p][0] = permutations_inv[p][0].inverse()
+                permutations_inv[p][1] = permutations_inv[p][1].inverse()
             return (PM_max, permutations_inv)
         else:
             return PM_max