preliminarily update the apt cache (#32)

Author: kayrus

action.yaml

@@ -25,8 +25,11 @@ runs:
     - name: Install python pip
       run: python3 -m pip install --upgrade pip
       shell: bash
+    - name: Update APT cache
+      run: sudo apt-get update
+      shell: bash
     - name: Erase MySQL package
-      run: sudo apt-get purge mysql-* || true
+      run: sudo apt-get purge -y mysql-* || true
       shell: bash
     # This is to avoid RabbitMQ to fail at startup because a wrong version of erlang was installed
     - name: Workaround for RabbitMQ