release: Preview Release (#3)

Updated `CHANGELOG.md` and `manifest.yml`

Signed-off-by: Devaraj Ranganna <devaraj.ranganna@arm.com>

CHANGELOG.md

@@ -1,11 +1,24 @@
 # Changelog for IoT Reference Arm Corstone-3xx
 
+## v202307.00-preview ( July 2023 )
+
+This is the preview release of the repository. This release includes the
+following:
+
+* pub-sub-demo: Add a new subscription topic
+* aws-iot-example: Improve MQTT reconnection logic
+* aws-iot-example: Split OTA MQTT agent task
+* aws-iot-example: Add integration tests to example
+* fri: Add unity testing framework
+* fri: Update MQTT agent and core to support integration tests
+* fri: Use release version of integration tests
+
 ## v202306.00-alpha ( June 2023 )
 
 The repository contains IoT Reference integration projects using Corstone
 platforms.
 
-This is the first alpha release for the repository. This release includes the
+This is the first alpha release of the repository. This release includes the
 following:
 
 * toolchain: Add GNU toolchain support

manifest.yml

@@ -1,5 +1,5 @@
 name : "IoT Reference Integration for Corstone-3xx"
-version: "v202306.00-alpha"
+version: "v202307.00-preview"
 description: |-
   "Reference IoT integration projects using the Arm Corstone platforms and FreeRTOS libraries"
 dependencies: