docs: updated docs

Author: ahmad-kemsan

src/main/java/com/cryptlex/lexfloatclient/LexFloatClient.java

@@ -99,7 +99,7 @@ public void invoke(int status) {
      *
      * @param key string of maximum length 256 characters with utf-8 encoding.
      * encoding.
-     * @param value string of maximum length 256 characters with utf-8 encoding.
+     * @param value string of maximum length 4096 characters with utf-8 encoding.
      * encoding.
      * @throws LexFloatClientException
      */