fix ci

Author: sebsto

scripts/ubuntu-install-swift.sh

@@ -52,9 +52,11 @@ sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyring
 sudo chmod a+r /etc/apt/keyrings/docker.asc
 
 # Add the repository to Apt sources:
+# shellcheck source=/etc/os-release
+. /etc/os-release
 echo \
   "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \
-  $(. /etc/os-release && echo "$VERSION_CODENAME") stable" | \
+  "$VERSION_CODENAME" stable" | \
   sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
 sudo apt-get update