Revise README to reflect project maintenance status

Updated README to indicate project is no longer maintained and recommended using a general-purpose web3 SDK.

Author: jcsec-security

README.md

@@ -1,7 +1,11 @@
+> [!WARNING]  
+> This project is no longer maintained, the usage of a general-purpose web3 SDK is recommended instead.
 
+---
+---
 
-# 🚀 zksync2-java Java SDK 🚀
 
+# 🚀 zksync2-java Java SDK 🚀
 
 [![License](https://img.shields.io/badge/license-MIT-blue)](LICENSE-MIT)
 [![License: Apache 2.0](https://img.shields.io/badge/license-Apache%202.0-orange)](LICENSE-APACHE)
@@ -12,9 +16,6 @@
 
 [![ZKsync Era Logo](logo.svg)](https://zksync.io/)
 
-> [!WARNING]  
-> Development of this SDK has been put on the community support. There is no active development of the repository, but the pull requests will be reviewed and merged.
-
 In order to provide easy access to all the features of ZKsync Era, the `zksync2-java` Java SDK was created,
 which is made in a way that has an interface very similar to those of [web3j](https://web3py.readthedocs.io/en/v6.6.1/). In
 fact, `web3j` is a peer dependency of our library and most of the objects exported by `zksync2-java` inherit from the corresponding `web3j` objects and override only the fields that need