Switch to stable repository.

.github/workflows/profiles-sync.yml

@@ -14,7 +14,7 @@ jobs:
             -   uses: actions/checkout@v2
             -   name: Install Cyberduck CLI
                 run: |
-                    echo -e "deb https://s3.amazonaws.com/repo.deb.cyberduck.io nightly main" | sudo tee /etc/apt/sources.list.d/cyberduck.list > /dev/null
+                    echo -e "deb https://s3.amazonaws.com/repo.deb.cyberduck.io stable main" | sudo tee /etc/apt/sources.list.d/cyberduck.list > /dev/null
                     sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys FE7097963FEFBE72
                     sudo apt-get update
                     sudo apt-get -y install duck