chore: Update changelog for version 2.1.1 with multi-framework targeting support and dependency updates

Author: memrecakal

README.md

@@ -34,8 +34,8 @@ ROS# can be used with Unity Engine __and/or__ with any compatible .NET project,
 
 ## Platform Support ##
 
-* The [ROS#](https://github.com/siemens/ros-sharp/tree/master/Libraries/) dependencies require __.NET 8__ and __Visual Studio 2022__ or higher.
-* The [Unity package](https://github.com/siemens/ros-sharp/tree/master/com.siemens.ros-sharp) has been developed with Unity Version __2022.3.17f1 (LTS)__ and should also be compatible with older versions.
+* The [ROS#](https://github.com/siemens/ros-sharp/tree/master/Libraries/) dependencies require __.NET 8__ or __.NET Standard 2.1__ and __Visual Studio 2022__ or higher.
+* The [Unity package](https://github.com/siemens/ros-sharp/tree/master/com.siemens.ros-sharp) has been developed with __Unity 2022.3.17f1 (LTS)__ and should also be compatible with older versions. __Unity 6__ support has not yet been thoroughly tested. However, some community members were able to use ROS# with Unity 6. 
 > For Unity versions below 2022.3: See [wiki](https://github.com/siemens/ros-sharp/wiki/User_Inst_Unity3DOnWindows).
 
 ## Repository Structure ##
@@ -66,5 +66,5 @@ Below is an overview of the main directories and their purposes:
 * [Contact the Project Team](mailto:ros-sharp.ct@siemens.com)
 
 ---
-© Siemens AG, 2017-2024
+© Siemens AG, 2017-2025
 

com.siemens.ros-sharp/CHANGELOG.md

@@ -7,6 +7,26 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 <!-- Unreleased -->
 
+## [2.1.1] - 02.06.2025
+
+### Added
+-  Multi-framework targeting support, new .NET Standard 2.1 alongside .NET 8.0.
+
+- Updated dependencies, including but not limited to:
+    - Microsoft.Bcl.AsyncInterfaces 9.0.5.
+    - NUnit 4.3.2.
+    - NUnit3TestAdapter 5.0.0.
+    - System.Runtime.CompilerServices.Unsafe 6.1.2.
+    - System.Text.Encodings.Web 9.0.5.
+    - System.Text.Json 9.0.5.
+    - System.Threading.Channels 9.0.5.
+    - System.IO.Pipelines 9.0.5.
+    - websocket-sharp 1.0.3-rc11
+
+### Fixed
+- Separate *Editor* and *Runtime* codes (`UnityFibonacciAction*.cs`), which caused build errors for Android and Windows.
+
+- Various wiki enhancements. 
 
 ## [2.1.0] - 20.01.2025
 
@@ -70,5 +90,5 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ---
 
-© Siemens AG, 2017-2024
+© Siemens AG, 2017-2025