chore(25.3.0): Add supported K8s and OpenShift versions

Author: Techassi

modules/ROOT/partials/release-notes/release-25.3.adoc

@@ -66,8 +66,25 @@ The following product versions are no longer supported (although images for rele
 
 ==== Supported Kubernetes versions
 
+This release supports the following Kubernetes versions:
+
+* `1.32`
+* `1.31`
+* `1.30`
+
+These Kubernetes versions are no longer supported:
+
+* `1.29`
+
 ==== Supported OpenShift versions
 
+This release is available in the RedHat Certified Operator Catalog for the following OpenShift versions:
+
+* `4.17`
+* `4.16`
+* `4.15`
+* `4.14`
+
 ==== Breaking changes
 
 Of the changes mentioned above, the following are breaking (or could lead to breaking behaviour), and you will need to adapt your existing CRDs accordingly: