Release notes for 1.12.7 (#11267)

* Release notes for 1.12.7

* Fix typo from a release notes

* Fix grammar mistakes

content/en/news/releases/1.12.x/announcing-1.12.7/index.md

@@ -0,0 +1,26 @@
+---
+title: Announcing Istio 1.12.7
+linktitle: 1.12.7
+subtitle: Patch Release
+description: Istio 1.12.7 patch release.
+publishdate: 2022-05-06
+release: 1.12.7
+aliases:
+    - /news/announcing-1.12.7
+---
+
+This release contains bug fixes to improve robustness. This release note describes what’s different between Istio 1.12.6 and Istio 1.12.7
+
+{{< relnote >}}
+
+## Changes
+
+- **Added** support for skipping the initial installation of CNI entirely.
+  ([Pull Request #38158](https://github.com/istio/istio/pull/38158))
+
+- **Fixed** the in-cluster operator unable to prune resources when the Istio control plane has active proxies connected.
+  ([Issue #35657](https://github.com/istio/istio/issues/35657))
+
+- **Fixed** an issue in webhook analysis which would make helm reconciler complain about overlapping webhooks.
+  ([Issue #36114](https://github.com/istio/istio/issues/36114))
+