Initialize group work for week 6

docs/group_assignments/group2/assignment6.md

+---
+title: Electronics design. Group 2 Work. 
+summary: Group work. Testing microcontroller.
+show_authors: true
+authors:
+    - name: Akseli Uunila
+      url: http://fabacademy.org/2023/labs/oulu/students/akseli-uunila/
+    - name: Abhishek Kumar
+      url: http://fabacademy.org/2023/labs/oulu/students/abhishek-kumar/
+    - name: Aarne Pohjonen
+      url: https://fabacademy.org/2023/labs/oulu/students/aarne-pohjonen/
+---
+
+# Group work for week 6
+
+This week we tested a microcontroller power usage with a multimeter.
+We demonstrated the use of an oscilloscope in 
+[week 4](https://fabacademy.org/2023/labs/oulu/group_assignments/group2/assignment4/).
+