[docs] Update Java version requirements in deployment documentation for clarity (apache#2131)

Signed-off-by: Harsh Mehta <[email protected]>

Author: HarshMehta112

website/docs/install-deploy/deploying-distributed-cluster.md

@@ -18,8 +18,9 @@ This doc provides a simple example of how to deploy a distributed cluster on fou
 
 ### Software Requirements
 
-Before you start to set up the system, make sure you have installed **Java 17** or higher **on each node** in your cluster. 
-Java 8 and Java 11 are not recommended.
+Before you start to set up the system, make sure you have installed **Java 11** or higher **on each node** in your cluster.
+Java 8 is not supported as the released binary is compiled with Java 11.
+While Fluss can run on Java 11, **Java 17 or higher is strongly recommended** for better performance.
 
 Additionally, you need a running **ZooKeeper** cluster with version 3.6.0 or higher. 
 We do not recommend to use ZooKeeper versions below 3.6.0.

website/docs/install-deploy/deploying-local-cluster.md

@@ -17,7 +17,7 @@ This page provides instructions on how to deploy a *local cluster* (on one machi
 Fluss runs on all *UNIX-like environments*, e.g. **Linux**, **Mac OS X**.
 Before you start to set up the system, make sure you have the following software installed on your test machine:
 
-- **Java 17** or higher (Java 8 and Java 11 are not recommended)
+- **Java 11** or higher (Java 8 is not supported; **Java 17 or higher is strongly recommended** for better performance)
 
 If your cluster does not fulfill these software requirements you will need to install/upgrade it.