JDK 25 compatibility

[mrniko]

Describe the bug
JDK 25 reports warnings:

WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
2025-12-23T20:48:33.210463889Z WARNING: sun.misc.Unsafe::arrayBaseOffset has been called by com.esotericsoftware.kryo.unsafe.UnsafeUtil (file:/application/BOOT-INF/lib/kryo-5.6.2.jar)
2025-12-23T20:48:33.210466222Z WARNING: Please consider reporting this to the maintainers of class com.esotericsoftware.kryo.unsafe.UnsafeUtil
2025-12-23T20:48:33.210467514Z WARNING: sun.misc.Unsafe::arrayBaseOffset will be removed in a future release

To Reproduce

        Kryo5Codec cc = new Kryo5Codec();
        cc.getValueEncoder().encode("123123");

Environment:

• OS: Any
• JDK Version: 25
• Kryo Version: 5.6.2

Additional context
Redisson lib