[kafka] 01/01: MINOR: Replace Java 20 with Java 21 in `README.md`

[ij...@apache.org]

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ijuma pushed a commit to branch java-21-readme
in repository https://gitbox.apache.org/repos/asf/kafka.git

commit 94c6cfa66ca281fa572e75dfa0114432b5b80659
Author: Ismael Juma <is...@juma.me.uk>
AuthorDate: Mon Sep 25 20:45:10 2023 -0700

    MINOR: Replace Java 20 with Java 21 in `README.md`
    
    I intended to include this in 99e6f12dd099, but somehow missed it.
    
    I will wait for KAFKA-15943 before updating the site docs with Java 21 (we never added Java 20 there).
---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 49dd49ef659..1a645dc409f 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@ See our [web site](https://kafka.apache.org) for details on the project.
 
 You need to have [Java](http://www.oracle.com/technetwork/java/javase/downloads/index.html) installed.
 
-We build and test Apache Kafka with Java 8, 11, 17 and 20. We set the `release` parameter in javac and scalac
+We build and test Apache Kafka with Java 8, 11, 17 and 21. We set the `release` parameter in javac and scalac
 to `8` to ensure the generated binaries are compatible with Java 8 or higher (independently of the Java version
 used for compilation). Java 8 support has been deprecated since Apache Kafka 3.0 and will be removed in Apache
 Kafka 4.0 (see [KIP-750](https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=181308223) for more details).