Merge pull request #22028 from NewRelic-K8s-Agents-Bot/add_kubernetes_release_notes-2025-10-28_12_03

feat: Add release notes for Kubernetes integration v3.48.0

Author: tejaswaroop-nr

src/content/docs/release-notes/infrastructure-release-notes/kubernetes-integration-release-notes/kubernetes-integration-3-48-0.mdx

@@ -0,0 +1,11 @@
+---
+subject: Kubernetes integration
+releaseDate: '2025-10-28'
+version: 3.48.0
+---
+
+For a detailed description of changes, see the [release notes](https://github.com/newrelic/nri-kubernetes/releases/tag/v3.48.0).
+
+This integration is included in the following chart versions:
+* [newrelic-infrastructure-3.53.0](https://github.com/newrelic/nri-kubernetes/releases/tag/newrelic-infrastructure-3.53.0)
+* [nri-bundle-6.0.19](https://github.com/newrelic/helm-charts/releases/tag/nri-bundle-6.0.19)