ci: 'downgrade' Ubuntu version to Bionic

Since the current Ubuntu Focal image in GH Actions is missing the
`kernel-modules-extra` package with the `scsi_debug` module[0], let's
change the distro flag from `ubuntu-20.04` (Focal) to `ubuntu-latest`
(currently Bionic, as Focal is still in the beta phase).

[0] https://github.community/t/missing-scsi-debug-linux-kernel-module-on-gh-actions/157698

diff --git a/.github/workflows/cibuild.yml b/.github/workflows/cibuild.yml
index df0345d32e2db54cd271bf1dc57f3094393b5414..e8556eba854986f3ecc26349e14eb7ddbfa06971 100644 (file)
--- a/.github/workflows/cibuild.yml
+++ b/.github/workflows/cibuild.yml
@@ -12,7 +12,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix: