Change log level of DIRECT activation fallback

A follow-up to #532

powerauth-restful-security-spring/src/main/java/io/getlime/security/powerauth/rest/api/spring/service/ActivationService.java

@@ -448,7 +448,7 @@ private ActivationLayer1Response processDirectOrCustomActivation(final Encryptio
             if (METHOD_OIDC.equals(method)) {
                 return processOidcActivation(eciesContext, request);
             } else {
-                logger.info("Unknown method: {} of direct activation, fallback to custom activation", method);
+                logger.debug("Unknown method: {} of direct activation, fallback to custom activation", method);
             }
         }