fix typos

README.md

@@ -4,8 +4,8 @@
 # UPDATE as of March 15, 2021
 NOTE: We've just release version 3.1.0. The new version includes the following changes:
 
-* **New hardware platform** - 3.0+ removes the Arduino from the robot platform, replacing it with the Adafruit [CRIKIT Raspberry Pi Hat](https://www.adafruit.com/product/3957). This simplifies powering the robot and reduces software complexity. 3.1.0 now uses the Raspberry Pi v4 - 3GB model.
-* **Recognize Updates** - The recognize function on the physical robot now uses Tensorflow Lite, which runs faster than the older version used previously. In addition, capability to make use of up to three user created models generated by Google Teachable Machine. In addition, a TRAIN action was added that gathers images from the robot camera for use in training Teachable Machine (NOTE: these images must be uploaded to Teachable Machine for training and model generation)
+* **New hardware platform** - 3.1.0+ uses the Raspberry Pi v4 - 2GB model, instead of Pi 3. 3.0+ removes the Arduino from the robot platform, replacing it with the Adafruit [CRIKIT Raspberry Pi Hat](https://www.adafruit.com/product/3957). This simplifies powering the robot and reduces software complexity. 
+* **Recognize Updates** - The visual recognize function on the physical robot now uses Tensorflow Lite, which runs faster than the previous version. In addition, capability has been added to make use of up to three user created models generated by Google Teachable Machine. For this, a TRAIN action was added that gathers images from the robot camera for use in training Teachable Machine (NOTE: these images must be uploaded to Teachable Machine for training and model generation)
 * **Condition Node changes** - the Float and String condition nodes are updated to have a better UX. Float now adds the **Otherwise** Condition.
 * **Capacitive Touch Sensing** - Up to four capacitive touch sensors are now possible. These allow a user to touch parts of the robot and get a reaction.
 * **Multiple analog inputs** - The software now supports up to eight simultaneous inputs on the CRICKIT.
@@ -101,7 +101,6 @@ The physical robot is currently based on a simple robot platform from Adafruit,
 
 <img src="docs/images/robot2020-1.jpg" width="512"><br><br>
 <img src="docs/images/robot2020-5.jpg" width="512"><br><br>
-<img src="docs/images/robot2020-6.jpg" width="512"><br><br>
 <img src="docs/images/robot2020-3.jpg" width="512"><br><br>
 
 ### Raspberry Pi Disk Image