updating whats new for latest version 4.19

adding new info for HCP

Author: fmcdonal

osd_whats_new/osd-whats-new.adoc

@@ -15,8 +15,14 @@ With its foundation in Kubernetes, {product-title} is a complete {OCP} cluster p
 [id="osd-new-changes-and-updates_{context}"]
 == New changes and updates
 
+[id="osd-q2-2025_{context}"]
+=== Q2 2025
+
+* **New version of {product-title} available.** {product-title} on {gcp} and {product-title} on {aws} versions 4.19 are now available for new clusters. For more information about upgrading to this latest version, see xref:../upgrading/osd-upgrades.adoc#osd-upgrades[Red Hat OpenShift Dedicated cluster upgrades].
+
 [id="osd-q1-2025_{context}"]
 === Q1 2025
+
 * **Support for new GCP instances.** {product-title} version 4.18 and later now supports `n4` and `c3` instance types on Google Cloud Platform. For more information, see xref:../osd_architecture/osd_policy/osd-service-definition.adoc#gcp-compute-types_osd-service-definition[Google Cloud compute types].
 
 * **New version of {product-title} available.** {product-title} on {gcp} and {product-title} on {aws} versions 4.18 are now available. For more information about upgrading to this latest version, see xref:../upgrading/osd-upgrades.adoc#osd-upgrades[Red Hat OpenShift Dedicated cluster upgrades].

rosa_release_notes/rosa-release-notes.adoc

@@ -17,6 +17,13 @@ toc::[]
 [id="rosa-q2-2025_{context}"]
 === Q2 2025
 
+ifdef::openshift-rosa[]
+* **New version of {product-title} available.** {product-title} version 4.19 is now available for new clusters. For more information about upgrading to this latest version, see xref:../upgrading/rosa-upgrading-sts.adoc#rosa-upgrading-sts[Upgrading ROSA (classic architecture) clusters].
+endif::openshift-rosa[]
+
+//remove from rosa distro once HCP split occurs.
+* **New version of {hcp-title} available.** {hcp-title} version 4.19 is now available. For more information about upgrading to this latest version, see xref:../upgrading/rosa-hcp-upgrading.adoc#rosa-hcp-upgrading[Upgrading {hcp-title} clusters].
+
 ifdef::openshift-rosa[]
 //Remove when ROSA HCP is published.
 * **ROSA Classic cluster ownership transfer is now available for {product-title}.** You can now transfer ownership of ROSA Classic clusters. For more information, see link:https://docs.redhat.com/en/documentation/openshift_cluster_manager/1-latest/html/managing_clusters/assembly-managing-clusters#initiating-rosa-classic-ownership-transfer-proc_downloading-and-updating-pull-secrets[Initiating ownership transfer of a ROSA Classic cluster].