Update coreMQTT submodule pointer (#111)

* Update coreMQTT submodule pointer

* Fix manifest commit

* Fix doxygen size

docs/doxygen/include/size_table.md

@@ -19,8 +19,8 @@
     </tr>
     <tr>
         <td>core_mqtt.c (coreMQTT)</td>
-        <td><center>4.0K</center></td>
-        <td><center>3.4K</center></td>
+        <td><center>4.1K</center></td>
+        <td><center>3.5K</center></td>
     </tr>
     <tr>
         <td>core_mqtt_state.c (coreMQTT)</td>
@@ -34,7 +34,7 @@
     </tr>
     <tr>
         <td><b>Total estimates</b></td>
-        <td><b><center>10.5K</center></b></td>
-        <td><b><center>8.6K</center></b></td>
+        <td><b><center>10.6K</center></b></td>
+        <td><b><center>8.7K</center></b></td>
     </tr>
 </table>

manifest.yml

@@ -5,7 +5,7 @@ description: |
 license: "MIT"
 dependencies:
   - name : "coreMQTT"
-    version: "v2.1.0"
+    version: "v2.3.1"
     repository:
       type: "git"
       url: "https://github.com/FreeRTOS/coreMQTT/"