ci: Add junitparser to the west_cmds workflow

Add the junitparser package to installed python packages for the west
commands workflow.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>

Author: pdgendt

.github/workflows/west_cmds.yml

@@ -65,7 +65,7 @@ jobs:
           ${{ runner.os }}-pip-${{ matrix.python-version }}
     - name: install pytest
       run: |
-        pip install pytest west pyelftools canopen natsort progress mypy intelhex psutil ply pyserial anytree
+        pip install pytest west pyelftools canopen natsort progress mypy intelhex psutil ply pyserial anytree junitparser
     - name: run pytest-win
       if: runner.os == 'Windows'
       run: |