OSDOCS-9562 Changing tech preview title heading

Author: cbippley

release_notes/ocp-4-15-release-notes.adoc

@@ -996,7 +996,7 @@ See link:https://access.redhat.com/articles/6955985[Navigating Kubernetes API de
 // Added after OCP GA
 
 [id="ocp-4-15-technology-preview-tables"]
-== Technology Preview support in recent releases
+== Technology Preview features status
 
 Some features in this release are currently in Technology Preview. These experimental features are not intended for production use. Note the following scope of support on the Red Hat Customer Portal for these features: