[v2023] devroot-manual-arm64: fix link to the arm64 devroot tarball

Fix link to the arm64 devroot tarball for apertis v2023

test-cases/devroot-manual-arm64.yaml

@@ -20,8 +20,8 @@ metadata:
 run:
   steps:
     - "Download the ARM64 devroot OSpack for the respective image version that your testing:"
-    - "For example, if you want to build for ARM64 with the v2021.0 release, then you can download the OSpack as follows:"
-    - $ wget -O ${HOME}/devroot.tar.gz https://images.apertis.org/release/v2021/v2021.0/amd64/devroot/ospack_v2021-amd64-devroot_v2021.0.tar.gz
+    - "For example, if you want to build for ARM64 with the v2023.6 release, then you can download the OSpack as follows:"
+    - $ wget -O ${HOME}/devroot.tar.gz https://images.apertis.org/release/v2023/v2023.6/arm64/devroot/ospack_v2023-arm64-devroot_v2023.6.tar.gz
     - "Create a directory for the devroot-64 in the /opt folder"
     - $ sudo mkdir -p /opt/devroot-64
     - "Extract the downloaded devroot:"