MINOR update the README docker image version (apache#19278)

The Docker image version should use `latest` instead of `3.7.0`,
allowing users to always pull the most up-to-date image from Docker Hub.

Reviewers: Sanskar Jhajharia <[email protected]>, TengYao Chi
<[email protected]>

Author: m1a2st

README.md

@@ -109,7 +109,7 @@ Using compiled files:
 
 Using docker image:
 
-    docker run -p 9092:9092 apache/kafka:3.7.0
+    docker run -p 9092:9092 apache/kafka:latest
 
 ### Cleaning the build ###
     ./gradlew clean