Update python-test.yml

Author: pjt0620

.github/workflows/python-test.yml

@@ -21,6 +21,7 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
+        sudo apt-get update
         sudo apt-get install python-bluetooth -qq -y
         python -m pip install --upgrade pip
         python -m pip install pytest pyserial==3.1.1 coveralls