Improve autoinflate feature description in FAQ

Clarified the explanation of the autoinflate feature, emphasizing control over scaling down throughput units.

Author: spelluru

articles/event-hubs/event-hubs-faq.yml

@@ -142,7 +142,7 @@ sections:
       - question: |
           How does Autoinflate feature of Event Hubs work?
         answer: |
-          The autoinflate feature lets you scale up your throughput units (TUs). It means that you can start by purchasing low TUs and autoinflate scales up your TUs as your ingress increases. It gives you a cost-effective option and complete control of the number of TUs to manage. This feature is a **scale-up only** feature, and you can scale down of the number of TUs by manually updating it. 
+          The autoinflate feature lets you scale up your throughput units (TUs). It means that you can start by purchasing low TUs and autoinflate scales up your TUs as your ingress increases. It gives you a cost-effective option and complete control of the number of TUs to manage. This feature is a **scale-up only** feature, and you can completely control the scaling down of the number of TUs by updating it. 
           
           You might want to start with low throughput units (TUs), for example, 2 TUs. If you predict that your traffic might grow to 15 TUs, enable the auto inflate feature on your namespace, and set the max limit to 15 TUs. You can now grow your TUs automatically as your traffic grows.