docs: Group supported product, Kubernetes and OpenShift versions

Author: Techassi

modules/ROOT/partials/release-notes/release-25.7.adoc

@@ -195,24 +195,26 @@ The `-nodeport` discovery ConfigMap has been deprecated in 25.3.0 and is removed
 Use the primary discovery ConfigMap instead.
 See https://github.com/stackabletech/kafka-operator/pull/868[kafka-operator#868].
 
-As with previous SDP releases, many product images have been updated to their latest versions.
+==== Supported versions
+
+===== Product versions
 
+As with previous SDP releases, many product images have been updated to their latest versions.
 Refer to the xref:operators:supported_versions.adoc[supported versions] documentation for a complete overview including LTS versions or deprecations.
 
-===== New versions
+====== New versions
 
 The following new product versions are now supported:
 
 * Apache Airflow: https://github.com/stackabletech/docker-images/issues/1074[2.10.5], https://github.com/stackabletech/docker-images/issues/1074[3.0.1 (experimental)]
 * Apache Druid: https://github.com/stackabletech/docker-images/issues/1075[33.0.0]
 * Apache HBase: https://github.com/stackabletech/docker-images/issues/1076[2.6.2]
-* Apache Kafka: https://github.com/stackabletech/docker-images/issues/1078[4.0.0 (experimental)^1^]
 * Apache NiFi: https://github.com/stackabletech/docker-images/issues/1079[2.4.0]
 * Apache Superset: https://github.com/stackabletech/docker-images/issues/1081[4.1.2]
 * Open Policy Agent: https://github.com/stackabletech/docker-images/issues/1084[1.4.2]
 * Trino: https://github.com/stackabletech/docker-images/issues/1082[476]
 
-===== Deprecated versions
+====== Deprecated versions
 
 The following product versions are deprecated and will be removed in a later release:
 
@@ -223,15 +225,15 @@ The following product versions are deprecated and will be removed in a later rel
 * Open Policy Agent: https://github.com/stackabletech/docker-images/issues/1084[1.0.1]
 * Trino: https://github.com/stackabletech/docker-images/issues/1082[470]
 
-===== Removed versions
+====== Removed versions
 
 The following product versions are no longer supported.
 These images for released product versions remain available https://oci.stackable.tech/[here,window=_blank]
 Information on how to browse the registry can be found xref:contributor:project-overview.adoc#docker-images[here,window=_blank]
 
 * Apache Druid: https://github.com/stackabletech/docker-images/issues/1075[30.0.0]
 * Apache Hbase: https://github.com/stackabletech/docker-images/issues/1076[2.4.18]
-* Apache Hadoop: https://github.com/stackabletech/docker-images/issues/1077[3.3.4], https://github.com/stackabletech/docker-images/issues/1077[3.4.0], https://github.com/stackabletech/docker-images/issues/1077[3.3.6^2^]
+* Apache Hadoop: https://github.com/stackabletech/docker-images/issues/1077[3.3.4], https://github.com/stackabletech/docker-images/issues/1077[3.4.0], https://github.com/stackabletech/docker-images/issues/1077[3.3.6^1^]
 * Apache Kafka: https://github.com/stackabletech/docker-images/issues/1078[3.7.1], https://github.com/stackabletech/docker-images/issues/1078[3.8.0]
 * Apache NiFi: https://github.com/stackabletech/docker-images/issues/1079[2.2.0 (experimental)]
 * Apache Spark: https://github.com/stackabletech/docker-images/issues/1080[3.5.2]
@@ -243,11 +245,10 @@ Information on how to browse the registry can be found xref:contributor:project-
 
 [.small]
 --
-. Unused in SDP, see https://github.com/stackabletech/kafka-operator/issues/690[kafka-operator#690] and https://github.com/stackabletech/docker-images/pull/1117[docker-images#1117]
 . Remove support for 3.3.6, it is still required by HBase, Hive, and Spark in this release.
 --
 
-==== Supported Kubernetes versions
+===== Kubernetes versions
 
 This release supports the following Kubernetes versions:
 
@@ -260,7 +261,7 @@ These Kubernetes versions are no longer supported:
 
 * `1.29`
 
-==== Supported OpenShift versions
+===== OpenShift versions
 
 This release is available in the RedHat Certified Operator Catalog for the following OpenShift versions: