doc (webapi): add yourkit acknowledgment (#983)

* Update README.md

* doc (webapi): add yourkit acknowledgment

README.md

@@ -171,3 +171,14 @@ feature (resources route): add route for resource creation
 - adapt handling of resources responder
 
 ```
+
+## Acknowledgments
+
+![](https://www.yourkit.com/images/yklogo.png)
+
+The Knora project is using YourKit for profiling.
+
+YourKit supports open source projects with its full-featured Java Profiler.
+YourKit, LLC is the creator of <a href="https://www.yourkit.com/java/profiler/">YourKit Java Profiler</a>
+and <a href="https://www.yourkit.com/.net/profiler/">YourKit .NET Profiler</a>,
+innovative and intelligent tools for profiling Java and .NET applications.