Create 1.22.2 release notes

reference/release-notes/1.22.2.md

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+## Introduction
+
+The Anbox Cloud team is pleased to announce the release of Anbox Cloud 1.22.2.
+
+Please see [component versions](https://anbox-cloud.io/docs/reference/component-versions) for a list of updated components.
+
+## New features & improvements
+
+* Android security updates for July 2024 (see [Android Security Bulletin - July 2024](https://source.android.com/docs/security/bulletin/2024-07-01) for more information).
+* The Android WebView has been updated to [126.0.6478.122](https://chromereleases.googleblog.com/2024/06/chrome-for-android-update_24.html).
+
+### Bug fixes
+
+The following bugs are fixed in this release:
+
+* [LP 2068688](https://bugs.launchpad.net/anbox-cloud/+bug/2068688) Discrepancy between the number of running instances and the number of active sessions. This discrepancy could be observed from the web dashboard and Grafana.
+
+* [LP 2065142](https://bugs.launchpad.net/anbox-cloud/+bug/2065142) A sporadic issue in which the Android container couldn't boot up successfully due to the following error:
+
+        MESA-VIRTIO: failed to create nv_mem from dma_buf
+
+* [LP 2067685](https://bugs.launchpad.net/anbox-cloud/+bug/2067685) With the default VirGL renderer, occasionally blocks of black overlay disrupts viewing the elements of the game.
+
+## Upgrade instructions
+
+See [Upgrade Anbox Cloud](https://anbox-cloud.io/docs/howto/update/upgrade-anbox) or [Upgrade the Anbox Cloud Appliance](https://anbox-cloud.io/docs/howto/update/upgrade-appliance) for instructions on how to update your Anbox Cloud deployment to the 1.22.2 release.