upgrade from Java 20 to 21 #13

.github/workflows/build.yml

@@ -52,7 +52,7 @@ jobs:
           GRAALVM_JAVA_VERSION: 17
           experimental: false
         - GRAALVM_VERSION: ${{ github.event.inputs.GRAALVM_VERSION || 'latest' }}
-          GRAALVM_JAVA_VERSION: 20
+          GRAALVM_JAVA_VERSION: 21
           experimental: true
         # https://github.com/graalvm/graalvm-ce-dev-builds/releases
         - GRAALVM_VERSION: dev

README.md

@@ -23,7 +23,7 @@ The image comes pre-installed with latest releases of:
 - [bash-funk](https://github.com/vegardit/bash-funk) Bash toolbox with adaptive Bash prompt
 - [Docker CE (Community Edition)](https://download.docker.com/linux/debian/dists/bullseye/pool/stable/amd64/) command line client
 - [git](https://packages.debian.org/en/git) command line client
-- [GraalVM CE Java 11, 17 or 20](https://www.graalvm.org/downloads/) with [native-image](https://www.graalvm.org/reference-manual/native-image/) extension.
+- [GraalVM CE Java 11, 17 or 21](https://www.graalvm.org/downloads/) with [native-image](https://www.graalvm.org/reference-manual/native-image/) extension.
 - [openssh-client](https://packages.debian.org/en/openssh-client) SSH command line client
 - [upx](https://upx.github.io/) executable packer