chore(syncmap): update readme

Author: vectrixdevelops

collections-fastutil/readme.md

@@ -8,16 +8,16 @@
 ![Build Status](https://github.com/vectrix-space/sync/actions/workflows/build.yml/badge.svg)
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 </div>
 
 > This project is experimental and not considered stable for production yet.
 
 Provides concurrent thread-safe collections for highly concurrent scenarios with `fastutil` in Java.
 
-* **X2ObjectSyncMap**: A high-performance implementation of `ConcurrentMap` in Java.
+* **X2ObjectSyncMap**: A high-performance implementation of `X2ObjectMap`'s with `fastutil` in Java.
 
   * Fully compatible with the `fastutil` X2Object collections.
   * Delivers up to **40× higher read and write throughput** than `X2ObjectMaps#synchronize()` under heavy contention.