Make Linux build update the repository before fetching the dependencies.

Author: Pehat

.github/workflows/linux.yml

@@ -11,7 +11,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Install packages
-      run: sudo apt-get install -y portaudio19-dev libsndfile1-dev
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y portaudio19-dev libsndfile1-dev
     - uses: actions/checkout@v4
       with:
         submodules: true