Added Whats New section for dotnet driver (#1068)

* Added Whats New section for dotnet driver * Update dotnet.md * Update dotnet.md Co-authored-by: ansoboleva <93702078+ansoboleva@users.noreply.github.com>

Author: tjoubert

drivers/dotnet.md

@@ -15,3 +15,7 @@ In addition the library provides:
 - Support for async/await across every API operation
 - Adherence to common-practice C# naming conventions
 - Consistent approach for each API endpoint
+
+## New Releases 
+
+A new release of the driver (version 1.1.1) is available now. To see the full list of updates and improvements, please refer to the [driver's GitHub page](https://github.com/ArangoDB-Community/arangodb-net-standard/releases/tag/1.1.1){:target="_blank"}.