Add to release notes

documentation/src/docs/asciidoc/release-notes/release-notes-5.13.0-M1.adoc

@@ -63,6 +63,10 @@ repository on GitHub.
   as for `@ParameterizedTest` may be used to provide arguments via constructor or field
   injection. Please refer to the
   <<../user-guide/index.adoc#writing-tests-parameterized-tests, User Guide>> for details.
+* New `BeforeContainerTemplateInvocationCallback` and
+  `AfterContainerTemplateInvocationCallback` extension callback interfaces allow
+  implementing extensions that are invoked before and after each invocation of a container
+  template.
 * New `TestTemplateInvocationContext.prepareInvocation(ExtensionContext)` callback method
   allows preparing the `ExtensionContext` before the test template method is invoked. This
   may be used, for example, to store entries in its `Store` to benefit from its cleanup