[KYUUBI #6076] Update Helm Chart and playground to use 1.8.1

# 🔍 Description
## Issue References 🔗

Promote the latest release version 1.8.1

## Describe Your Solution 🔧

Update Helm Chart and playground to use 1.8.1

## Types of changes 🔖

- [ ] Bugfix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing functionality to change)

## Test Plan 🧪

Review

---

# Checklist 📝

- [x] This patch was not authored or co-authored using [Generative Tooling](https://www.apache.org/legal/generative-tooling.html)

**Be nice. Be informative.**

Closes #6076 from pan3793/r-181.

Closes #6076

aada476 [Cheng Pan] Update Helm Chart and playground to use 1.8.1

Authored-by: Cheng Pan <chengpan@apache.org>
Signed-off-by: Cheng Pan <chengpan@apache.org>

charts/kyuubi/Chart.yaml

@@ -20,7 +20,7 @@ name: kyuubi
 description: A Helm chart for Kyuubi server
 type: application
 version: 0.1.0
-appVersion: 1.8.0
+appVersion: 1.8.1
 home: https://kyuubi.apache.org
 icon: https://raw.githubusercontent.com/apache/kyuubi/master/docs/imgs/logo.png
 sources:

docker/playground/.env

@@ -18,8 +18,8 @@
 AWS_JAVA_SDK_VERSION=1.12.367
 HADOOP_VERSION=3.3.6
 HIVE_VERSION=2.3.9
-ICEBERG_VERSION=1.4.2
-KYUUBI_VERSION=1.8.0
+ICEBERG_VERSION=1.4.3
+KYUUBI_VERSION=1.8.1
 KYUUBI_HADOOP_VERSION=3.3.6
 POSTGRES_VERSION=12
 POSTGRES_JDBC_VERSION=42.3.4