upgrade CI operationg system to Ubuntu 20.04 LTS amd64

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index babf7fc91ba23592990781daa707a0a6a3840abd..cf9453a14a4ad8be9b9e14651b88594182132f19 100644 (file)
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -86,7 +86,7 @@ jobs:
         sudo lxd init --auto
     - name: Launch container
       run: |
-        sudo lxc launch ubuntu:19.10/amd64 builder
+        sudo lxc launch ubuntu:20.04/amd64 builder
         sudo lxc exec builder -- bash -c 'while [ "$(systemctl is-system-running 2>/dev/null)" != "running" ] && [ "$(systemctl is-system-running 2>/dev/null)" != "degraded" ]; do :; done'
     - name: Prepare build environment.
       run: |