docs: update the changelog.

CHANGELOG.md

@@ -16,10 +16,10 @@ this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 ### Changed
 
 - Use `aiohttp` and `aiofiles` for more performant and robust handling of service calls
-    and downloading of 3DEP map requests. This should improve performance and robustness
-    of service calls, and reduce the number of connections made to dynamic 3DEP
-    services. As a results, `aiohttp` and `aiofiles` are now required dependencies and
-    `urllib3` is no longer needed.
+    and downloading of 3DEP map requests. This should limits the number of connections
+    made to the dynamic 3DEP service to avoid hammering the service and can reduce the
+    memory usage when downloading large files. As a results, `aiohttp` and `aiofiles` are
+    now required dependencies and `urllib3` is no longer needed.
 - More robust handling of closing `VRTPool` at exit by creating a new class method
     called `close`. This method is called by the `atexit` module to ensure that the
     pools are closed when the program exits.