hotfix pipefail issue alpine-teamspeak

Replace the final '| head -1' in both install and ct scripts with 'awk 'NR==1'' to pick the first matching Teamspeak release line. In the ct script the previous temporary toggling of pipefail was also removed, simplifying the command. This improves compatibility and reduces reliance on an extra utility in minimal environments.

ct/alpine-teamspeak-server.sh

@@ -27,7 +27,7 @@ function update_script() {
     exit
   fi
 
-  set +o pipefail && RELEASE=$(curl -fsSL https://teamspeak.com/en/downloads/#server | sed -n 's/.*teamspeak3-server_linux_amd64-\([0-9.]*[0-9]\).*/\1/p' | head -1) && set -o pipefail
+  RELEASE=$(curl -fsSL https://teamspeak.com/en/downloads/#server | sed -n 's/.*teamspeak3-server_linux_amd64-\([0-9.]*[0-9]\).*/\1/p' | awk 'NR==1')
 
   if [ "${RELEASE}" != "$(cat ~/.teamspeak-server)" ] || [ ! -f ~/.teamspeak-server ]; then
     msg_info "Updating ${APP} LXC"

install/alpine-teamspeak-server-install.sh

@@ -20,7 +20,7 @@ $STD apk add --no-cache \
   libc6-compat
 msg_ok "Installed dependencies"
 
-RELEASE=$(curl -fsSL https://teamspeak.com/en/downloads/#server | sed -n 's/.*teamspeak3-server_linux_amd64-\([0-9.]*[0-9]\).*/\1/p' | head -1)
+RELEASE=$(curl -fsSL https://teamspeak.com/en/downloads/#server | sed -n 's/.*teamspeak3-server_linux_amd64-\([0-9.]*[0-9]\).*/\1/p' | awk 'NR==1')
 msg_info "Installing Teamspeak Server v${RELEASE}"
 mkdir -p /opt/teamspeak-server
 cd /opt/teamspeak-server