[v2.3.1] Update changelog, version numbers and .md files for release (#298)

* Update the CHANGELOG.md to include v2.3.1 information
* Update version number to "v2.3.1+" in main branch in public header file macro, manifest.yml and config.doxyfile.

Author: chinglee-iot

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog for coreMQTT Client Library
 
+## v2.3.1 (July 2024)
+
+### Changes
+
+- [#297](https://github.com/FreeRTOS/coreMQTT/pull/297) Update release action for version number update and verification.
+
 ## v2.3.0 (June 2024)
 
 ### Changes

docs/doxygen/config.doxyfile

@@ -48,7 +48,7 @@ PROJECT_NAME           = coreMQTT
 # could be handy for archiving the generated documentation or if some version
 # control system is used.
 
-PROJECT_NUMBER         = v2.3.0+
+PROJECT_NUMBER         = v2.3.1+
 
 # Using the PROJECT_BRIEF tag one can provide an optional one line description
 # for a project that appears at the top of each page and should give viewer a

manifest.yml

@@ -1,5 +1,5 @@
 name : "coreMQTT"
-version: "v2.3.0+"
+version: "v2.3.1+"
 description: |
   "Client implementation of the MQTT 3.1.1 specification for embedded devices.\n"
 license: "MIT"

source/include/core_mqtt.h

@@ -48,7 +48,7 @@
  * If MQTT_LIBRARY_VERSION ends with + it represents the version in development
  * after the numbered release.
  */
-#define MQTT_LIBRARY_VERSION    "v2.3.0+"
+#define MQTT_LIBRARY_VERSION    "v2.3.1+"
 /** @endcond */
 
 /**