Update index to add supported runtimes

Signed-off-by: Henrique Graca <[email protected]>

Author: hjgraca

docs/index.md

@@ -7,7 +7,10 @@ description: Powertools for AWS Lambda (.NET)
 
 # Powertools for AWS Lambda (.NET)
 
-Powertools for AWS Lambda (.NET) (which from here will be referred as Powertools) is a suite of utilities for [AWS Lambda](https://aws.amazon.com/lambda/) functions to ease adopting best practices such as tracing, structured logging, custom metrics, and more. Please note, **Powertools for AWS Lambda (.NET) is optimized for .NET 6+**.
+Powertools for AWS Lambda (.NET) (which from here will be referred as Powertools) is a suite of utilities for [AWS Lambda](https://aws.amazon.com/lambda/) functions to ease adopting best practices such as tracing, structured logging, custom metrics, and more.
+
+!!! info
+    **Supports .NET 6 and .NET 8 runtimes**
 
 ???+ tip
     Powertools is also available for [Python](https://docs.powertools.aws.dev/lambda/python/){target="_blank"}, [Java](https://docs.powertools.aws.dev/lambda/java/){target="_blank"}, and [TypeScript](https://docs.powertools.aws.dev/lambda/typescript/latest/){target="_blank"}.