modify changelog [ci skip]

changelog.yaml

@@ -1,13 +1,14 @@
 v0.2.0:
   title: GiggleBot MicroPython Firmware v0.2.0
   body:
-    - Add sphinx documentation for readthedocs.org which includes some tutorials, the API description
-      of the `gigglebot.py`/`gigglebot_advanced.py`/`distance_sensor.py` modules.
+    - Add sphinx documentation for readthedocs.org which includes some tutorials and the API description
+      of `gigglebot.py`/`gigglebot_advanced.py`/`distance_sensor.py` modules.
     - Add less complex module called the `gigglebot.py` and rename the old one to `gigglebot_advanced.py`.
     - Optimize `gigglebot.py` module for the microbit board to use less RAM.
     - Fix formatting and semantic issues in the documentation.
-    - Fix syntax and logic problems in `gigglebot_advanced.py` module (which is the old module called `gigglebot.py`).
+    - Fix syntax and logic issues in `gigglebot_advanced.py` module (which is the old module called `gigglebot.py`).
     - Minify python modules before integrating them into the firmware.
+    - Add `usedspace.txt` file as build artifact to indicate the size in bytes of the firmware.
 v0.1.0:
   title: GiggleBot MicroPython Firmware v0.1.0
   body: