Add documentation about bugfix

Author: melix

docs/src/docs/asciidoc/index.adoc

@@ -21,12 +21,14 @@ If you are interested in contributing, please refer to our https://github.com/gr
 
 * Native testing support can now be explicitly disabled via `skipNativeTests`.
    - See <<maven-plugin.adoc#testing-support-disabling, Disabling testing support>> for details.
+* Fixed race condition which prevented the agent files to be generated properly if tests were executed concurrently
 * Documented version compatibility for the JUnit Platform and Maven Surefire plugin.
    - See <<maven-plugin.adoc#testing-support-version-compatibility, Version compatibility>> for details.
 
 ==== Gradle plugin
 
 * Fixed `nativeRun` not working properly under Windows
+* Fixed race condition which prevented the agent files to be generated properly if tests were executed concurrently
 
 === Release 0.9.9