ci: add latest tag for vulkan images

Signed-off-by: Ettore Di Giacinto <[email protected]>

Author: mudler

.github/workflows/image.yml

@@ -320,6 +320,7 @@ jobs:
             platforms: 'linux/amd64'
             tag-latest: 'false'
             tag-suffix: '-vulkan-ffmpeg-core'
+            latest-image: 'latest-vulkan-ffmpeg-core'
             ffmpeg: 'true'
             image-type: 'core'
             runs-on: 'arc-runner-set'