Add ipykernel version 6.29.2 to environment.yml

This will fix the error happening with the creation of codespaces using the devcontainer for session III

Author: jackdmarquez

hands-on/session III/environment.yml

@@ -4,6 +4,7 @@ channels:
   - defaults
 dependencies:
   - python=3.10
+  - ipykernel==6.29.2
   - pip
   - pip:
     - numpy