Oct 14 (Reuters) - Germany’s top economic institutes on Thursday cut their joint forecast for 2021 growth of Europe’s largest economy to 2.4% from the 3.7%, as supply bottlenecks continue to hamper manufacturing. The institutes raised their growth forecast for next year to 4.8% from 3.9% and said the German economy will reach normal capacity utilization over the course of 2022. Meanwhile, inflation will grow by 2.5% in 2022, said the institutes. In 2023, inflation is expected to rise by 1.7%. (Reporting by Miranda Murray Editing by Riham Alkousaa) Our Standards: The Thomson Reuters Trust Principles.