DOC-240 add note about cloud mode session tracking

Author: markzegarelli

src/connections/destinations/catalog/actions-amplitude/index.md

@@ -25,6 +25,7 @@ Amplitude (Actions) provides the following benefits over the classic Amplitude d
 - **Clearer mapping of data**. Actions-based destinations enable you to define the mapping between the data Segment receives from your source, and the data Segment sends to the destination.
 - **Support for Amplitude's HTTP API v2**. Amplitude (Actions) is built on the latest version of [Amplitude's HTTP API](https://developers.amplitude.com/docs/http-api-v2){:target="_blank"}.
 - **Revenue is a top-level property**. Amplitude (Actions) elevates `revenue` to a top-level property in requests sent to Amplitude. This enables inclusion of this data in Amplitude features like customer LTV reports.
+- **Session tracking in cloud-mode**. Amplitude (Actions) supports sending session details from cloud-mode sources.
 
 ## Getting started