Release notes for 1.19.5 (#14305)

* Release notes for 1.19.5

Signed-off-by: Kalya Subramanian <kasubra@microsoft.com>

* Apply suggestions from code review

Co-authored-by: Eric Van Norman <ericvn@us.ibm.com>

* Update content/en/news/releases/1.19.x/announcing-1.19.5/index.md

Co-authored-by: Eric Van Norman <ericvn@us.ibm.com>

---------

Signed-off-by: Kalya Subramanian <kasubra@microsoft.com>
Co-authored-by: Eric Van Norman <ericvn@us.ibm.com>

content/en/news/releases/1.19.x/announcing-1.19.5/index.md

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+---
+title: Announcing Istio 1.19.5
+linktitle: 1.19.5
+subtitle: Patch Release
+description: Istio 1.19.5 patch release.
+publishdate: 2023-12-12
+release: 1.19.5
+---
+
+This release implements the security updates described in our Dec 12th post, [`ISTIO-SECURITY-2023-005`](/news/security/istio-security-2023-005) along with bug fixes to improve robustness.
+
+This release note describes what’s different between Istio 1.19.4 and 1.19.5.
+
+{{< relnote >}}
+
+## Changes
+
+- **Fixed** an issue where the webhook generated with `istioctl tag set` is unexpectedly being removed by the installer.
+  ([Issue #47423](https://github.com/istio/istio/issues/47423))
+
+- **Fixed** an issue where multi-cluster leader election cannot prioritize local over remote leaders.
+  ([Issue #47901](https://github.com/istio/istio/issues/47901))
+
+- **Fixed** a memory leak when `hostNetwork` pods scale up and down.
+  ([Issue #47893](https://github.com/istio/istio/issues/47893))
+
+- **Fixed** a memory leak when `WorkloadEntries` change their IP address.
+  ([Issue #47893](https://github.com/istio/istio/issues/47893))
+
+- **Fixed** a memory leak when a `ServiceEntry` is removed.
+  ([Issue #47893](https://github.com/istio/istio/issues/47893))
+
+## Security update
+
+- Changes to Istio CNI Permissions as described in [`ISTIO-SECURITY-2023-005`](/news/security/istio-security-2023-005).