chore(Algebra/Polynomial/Homogenize): fix typo in lemma name (leanprover-community#37725)

Rename the lemma `isHomogenous_toTupleMvPolynomial` to `isHomogeneous_toTupleMvPolynomial`.

Co-authored-by: int-y1 <jason_yuen2007@hotmail.com>

Author: int-y1

Mathlib/Algebra/Polynomial/Homogenize.lean

@@ -254,12 +254,15 @@ lemma toTupleMvPolynomial_one_eq (p : R[X]) :
     p.toTupleMvPolynomial 1 = (MvPolynomial.X 1) ^ p.natDegree :=
   rfl
 
-lemma isHomogenous_toTupleMvPolynomial (p : R[X]) (i : Fin 2) :
+lemma isHomogeneous_toTupleMvPolynomial (p : R[X]) (i : Fin 2) :
     (p.toTupleMvPolynomial i).IsHomogeneous p.natDegree := by
   fin_cases i
   · simp [toTupleMvPolynomial]
   · simpa [toTupleMvPolynomial] using MvPolynomial.isHomogeneous_X_pow 1 p.natDegree
 
+@[deprecated (since := "2026-04-06")]
+alias isHomogenous_toTupleMvPolynomial := isHomogeneous_toTupleMvPolynomial
+
 lemma eval_X_toTupleMvPolynomial_zero_eq (p : R[X]) :
     MvPolynomial.aeval ![X, 1] (p.toTupleMvPolynomial 0) =
       p * MvPolynomial.aeval ![X, 1] (p.toTupleMvPolynomial 1) := by