Replace jdk 11 with 17, because dCache now requires it; update dCache version in example

Author: Onno Zweers

docs/TheBook/src/main/markdown/dcache-minimal-installation.md

@@ -13,21 +13,21 @@ and how dCache's users will interact with the system.  There is no one size fits
   - At least 500 MiB free disk space
 
 - Software:
-  - OpenJDK 11
+  - OpenJDK 17
   - Postgres SQL Server 13.0 or later
   - ZooKeeper version 3.5 (embedded)
 
 ## Minimal Installation
 
 ### Java 
-For this installation, we use OpenJDK 11 (java 17 for dCache version 10.2 and later)
+For this installation, we use OpenJDK 17.
 
 ```bash
 sudo -s
 
-yum install java-11-openjdk
+dnf install java-17-openjdk
 
-dnf install java-11-openjdk-devel
+dnf install java-17-openjdk-devel
 ```
 For a production installation, you will need standalone ZooKeeper version 3.8 or later.  
 

docs/TheBook/src/main/markdown/install.md

@@ -74,14 +74,14 @@ rpm -ivh https://www.dcache.org/old/downloads/1.9/repo/##SERIES##/dcache-##VERSI
 |   1:dcache-##VERSION##-1                   ################################# [100%]
 ```
 
-For example, `##SERIES##` could be `9.1` and `##VERSION##` could be `9.1.1`.
+For example, `##SERIES##` could be `10.1` and `##VERSION##` could be `10.1.1`.
 
 ### Installing prerequisite packages
 
 First, install OpenJDK and httpd-tools packages.
 
 ```console-root
-yum install java-11-openjdk-headless httpd-tools
+yum install java-17-openjdk-headless httpd-tools
 ```
 
 ### Installing PostgreSQL