updated readme (#26)

* updated readme

* update readme

Author: moe-sani

README.md

@@ -26,6 +26,12 @@ This library lets you run machine learning models and collect sensor data on Lin
     $ git clone https://github.com/edgeimpulse/linux-sdk-python
     ```
 
+4. Install pip dependencies:
+
+    ```
+    $ pip3 install -r requirements.txt
+    ```
+
     For the computer vision examples you'll want `opencv-python>=4.5.1.48`
     Note on macOS on apple silicon, you will need to use a later version,
     4.10.0.84 tested and installs cleanly