Relative Vaccine Effectiveness of Adjuvanted Quadrivalent Inactivated Influenza Vaccine (aIIV4) vs High-Dose Quadrivalent Inactivated Influenza Vaccine (HD-IIV4) for Prevention of Lab-Confirmed Influenza among adults ≥65 years of age for the 2023-24 and 2024-25 season in the United States