Update jsk 21

content/getting-started/download-dicom-viewer.en.md

@@ -20,8 +20,8 @@ If you want to get automatic updates of the Weasis DICOM viewer then check these
 - [Arch Linux repository](https://aur.archlinux.org/packages/weasis-bin/)
 - [Gentoo repository](https://gpo.zugaina.org/media-gfx/weasis-bin)
 
-{{% notice note %}}
-The package management systems above can limit certain functionalities because they work in sandbox mode.
+{{% notice warning %}}
+The package management systems above can limit certain functionalities because they work in sandbox mode, especially for Flatpak and Snap. 
 
 The Snap package installation uses a `<user.home>/snap/weasis/current/.weasis` directory instead of the `<user.home>/.weasis` directory for all other installations.
 {{% /notice %}}

content/getting-started/guidelines.en.md

@@ -14,7 +14,7 @@ We recommend the use of [IntelliJ IDEA](https://www.jetbrains.com/idea/) because
 ### Prerequisites
 
 1. Install [IntelliJ IDEA](https://www.jetbrains.com/idea/) (Community or Ultimate Edition 2023.1 or higher)
-2. Use JDK 20 or higher and set the language level to `20 Preview`.
+2. Use JDK 21 or higher and set the language level to `20 Preview`.
 ![Project Structure](/images/conf/project-structure.png)
 3. In _File > Settings... > Plugins_ install google-java-format plugin from Marketplace and enable it from *google-java-format Settings*