Try Changing APT mirror in GitHub workflow

Author: martinburchell

.github/workflows/im-build.yml

@@ -34,6 +34,13 @@ jobs:
       uses: actions/setup-python@v5
       with:
         python-version: '3.10'
+    - name: Change apt mirror
+      run: |
+          set -euo pipefail
+          # azure.archive.ubuntu.com is flaky
+          sudo sed -i 's/azure.archive.ubuntu.com/archive.ubuntu.com/' /etc/apt/sources.list
+          sudo apt-get update -o APT::Update::Error-Mode=any
+
     - name: Install dependencies
       run: |
         set -euo pipefail