Switch APT repos to canonical ubuntu repos rather than Azure mirror (#40205)

.github/actions/setup-ruby/action.yml

@@ -13,6 +13,7 @@ runs:
     - name: Install system dependencies
       shell: bash
       run: |
+        sudo sed -i s:azure\.archive\.ubuntu\.com:archive.ubuntu.com:g /etc/apt/apt-mirrors.txt
         sudo apt-get update
         sudo apt-get install --no-install-recommends -y \
           libicu-dev \