Flink v1.20 is supported

Author: fqaiser94

docs/content.zh/docs/concepts/overview.md

@@ -44,7 +44,7 @@ Flink Kubernetes Operator 旨在承担人工操作 Flink 部署的职责。 人
   - 有状态和无状态应用程序升级
   - 保存点的触发和管理
   - 处理错误，回滚失败的升级
-- 多 Flink 版本支持：v1.16, v1.17, v1.18, v1.19
+- 多 Flink 版本支持：v1.16, v1.17, v1.18, v1.19, v1.20
 - [Deployment Modes]({{< ref "docs/custom-resource/overview#application-deployments" >}}):
   - Application 集群
   - Session 集群

docs/content/docs/concepts/overview.md

@@ -36,7 +36,7 @@ Flink Kubernetes Operator aims to capture the responsibilities of a human operat
   - Stateful and stateless application upgrades
   - Triggering and managing savepoints
   - Handling errors, rolling-back broken upgrades
-- Multiple Flink version support: v1.16, v1.17, v1.18, v1.19
+- Multiple Flink version support: v1.16, v1.17, v1.18, v1.19, v1.20
 - [Deployment Modes]({{< ref "docs/custom-resource/overview#application-deployments" >}}):
   - Application cluster
   - Session cluster