Document breaking change in ParentDirProvider in the Release Notes

Issue: #1738

Author: sbrannen

documentation/src/docs/asciidoc/release-notes/release-notes-5.4.0-RC1.adoc

@@ -66,7 +66,8 @@ repository on GitHub.
 
 ==== Deprecations and Breaking Changes
 
-* ❓
+* The `ParentDirProvider` strategy in the `TempDirectory` extension introduced in 5.4 M1
+  now accepts a `TempDirContext` instead of `ParameterContext`.
 
 ==== New Features and Improvements