fix: use PATCH not PUT to update Caddy routes

Caddy admin API: PUT creates a key (409 if exists), PATCH replaces it.
Since routes always exists after startup from caddy.json, PATCH is correct.

builder/build.sh

@@ -155,7 +155,7 @@ print(json.dumps(routes))
         --write-out "\nHTTP_STATUS:%{http_code}" \
         "${CADDY_API}/config/apps/http/servers/hiy/routes" \
         --header "Content-Type: application/json" \
-        --request PUT \
+        --request PATCH \
         --data "$UPDATED" 2>&1)
     set -e
     if echo "$CADDY_RESP" | grep -q "HTTP_STATUS:2"; then