Release notes for 1.4.8 (#7121)

* Release notes for 1.4.8

* Merge, reorder items.

content/en/news/releases/1.4.x/announcing-1.4.8/index.md

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+---
+title: Announcing Istio 1.4.8
+linktitle: 1.4.8
+subtitle: Patch Release
+description: Istio 1.4.8 patch release.
+publishdate: 2020-04-23
+release: 1.4.8
+aliases:
+    - /news/announcing-1.4.8
+---
+
+This release includes bug fixes to improve robustness. This release note describes what’s different
+between Istio 1.4.7 and Istio 1.4.8.
+
+The fixes below focus on various issues related to installing Istio on OpenShift with CNI. Instructions
+for installing Istio on OpenShift with CNI can be found [here](/docs/setup/additional-setup/cni/#instructions-for-istio-1-4-x-and-openshift).
+
+{{< relnote >}}
+
+## Bug fixes
+
+- **Fixed** Fixed CNI installation on OpenShift ([Issue 21421](https://github.com/istio/istio/pull/21421)) ([Issue 22449](https://github.com/istio/istio/issues/22449)).
+- **Fixed** Not all inbound ports are redirected when CNI is enabled ([Issue 22448](https://github.com/istio/istio/issues/22498)).
+- **Fixed** Syntax errors in gateway templates with GoLang 1.14 ([Issue 22366](https://github.com/istio/istio/issues/22366)).
+- **Fixed** Remove namespace from `clusterrole` and `clusterrolebinding` ([PR 297](https://github.com/istio/cni/pull/297)).