ci: fix BSD head -n -1 -> sed $d

.github/workflows/deploy.yml

@@ -159,6 +159,6 @@ jobs:
             -d "{\"access_token\": \"$TOKEN\"}" \
             "$INDIEKIT_INTERNAL_URL/syndicate")
           HTTP_CODE=$(echo "$RESPONSE" | tail -1)
-          BODY=$(echo "$RESPONSE" | head -n -1)
+          BODY=$(echo "$RESPONSE" | sed '$d')
           echo "HTTP $HTTP_CODE: $BODY"
           [ "$HTTP_CODE" -lt 400 ]