Default Pi deploy branch to master

docs/deploy-raspberry-pi.md

@@ -42,7 +42,7 @@ Arguments:
 ## Useful environment overrides
 
 ```bash
-DEPLOY_REF=main \
+DEPLOY_REF=master \
 DEPLOY_PATH=/var/www/warehouse \
 scripts/deploy-raspi.sh pi raspberrypi.local git@github.com:YOUR_USER/warehouse.git DietPi.ntp.kentcommunications.com
 ```

scripts/deploy-raspi.sh

@@ -11,7 +11,7 @@ ssh_host="$2"
 repo_url="$3"
 domain="${4:-DietPi.ntp.kentcommunications.com}"
 deploy_path="${DEPLOY_PATH:-/var/www/warehouse}"
-deploy_ref="${DEPLOY_REF:-main}"
+deploy_ref="${DEPLOY_REF:-master}"
 
 ssh "${ssh_user}@${ssh_host}" bash -s -- "$repo_url" "$domain" "$deploy_path" "$deploy_ref" <<'REMOTE'
 set -euo pipefail