EH: CS-1984 Make dbwriter work with current Java versions

// Updated installation guide and release notes

Author: jgabler-hpc

doc/markdown/manual/installation-guide/10_dbwriter.md

@@ -12,7 +12,7 @@ Before installing DBWriter make sure to have the following requirements met:
 
 * A database server is installed (supported are PostgreSQL, MySQL, Oracle).
 * The database is accessible from the DBWriter host.
-* On the DBWriter host, Java 8 must be installed. The DBWriter host can be any host that can access the database server and the xxQS_NAMExx installation directory.
+* On the DBWriter host, Java 11 or higher must be installed. The DBWriter host can be any host that can access the database server and the xxQS_NAMExx installation directory.
 * DBWriter uses JDBC to connect to the database. Get the JDBC driver for your database server.
   * It is a jar file, e.g., for PostgreSQL: `postgresql-42.7.7.jar`
   * You usually get it from the database vendor's website.

doc/markdown/manual/release-notes/03_major_enhancements.md

@@ -1,5 +1,15 @@
 # Major Enhancements
 
+## v9.1.2
+
+### Updates to dbwriter
+
+In this release, the required Java version and many other dependencies have been updated. The DBWriter now supports Java 11 or higher, ensuring compatibility with modern environments and reducing the risk of compatibility issues.
+
+When you have an existing DBWriter installation, please ensure that at least Java 11 is installed on the DBWriter host.
+Edit the file `$SGE_ROOT/$SGE_CELL/common/sgedbwriter` and modify the line setting `JAVA_HOME` to point to the Java 11 (or higher) installation directory.   
+If you are doing a fresh installation, specify the Java 11 (or higher) installation directory when asked during the installation process.
+
 ## v9.1.0
 
 ### Advanced Binding Framework for Topology-Aware Job Placement