Use ubuntu-latest runners

Signed-off-by: Evan Lezar <elezar@nvidia.com>

Author: elezar

.github/workflows/image.yaml

@@ -28,7 +28,7 @@ on:
 
 jobs:
   build:
-    runs-on: linux-amd64-cpu4
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         dist: