Polishing.

Use correct Redis and Java versions.

See #2384

Author: mp911de

README.adoc

@@ -126,7 +126,7 @@ You also need JDK 17 or above.
  $ ./mvnw clean install
 ----
 
-If you want to build with the regular `mvn` command, you will need https://maven.apache.org/run-maven/index.html[Maven v3.5.0 or above].
+If you want to build with the regular `mvn` command, you will need https://maven.apache.org/run-maven/index.html[Maven v3.8.0 or above].
 
 _Also see link:CONTRIBUTING.adoc[CONTRIBUTING.adoc] if you wish to submit pull requests, and in particular please sign the https://cla.pivotal.io/sign/spring[Contributor’s Agreement] before your first non-trivial change._
 

src/main/asciidoc/preface.adoc

@@ -51,10 +51,10 @@ See its https://docs.spring.io/spring-data/data-keyvalue/examples/retwisj/curren
 [[requirements]]
 == Requirements
 
-Spring Data Redis 2.x binaries require JDK level 8.0 and above and https://spring.io/projects/spring-framework/[Spring Framework] {springVersion} and above.
+Spring Data Redis binaries require JDK level 17 and above and https://spring.io/projects/spring-framework/[Spring Framework] {springVersion} and above.
 
 In terms of key-value stores, https://redis.io[Redis] 2.6.x or higher is required.
-Spring Data Redis is currently tested against the latest 4.0 release.
+Spring Data Redis is currently tested against the latest 6.0 release.
 
 [[get-started:help]]
 == Additional Help Resources