images/scripts: Update runtime image for GHA
images/scripts: Update runtime image for GHA

The current script didn't update runtime image in GHA workflow as
highlighted by the below comment. This commit is to address such
discrepancy.

Relates https://github.com/cilium/cilium/pull/20943#discussion_r948179196

Signed-off-by: Tam Mach <2524536bcff1dac29d2f6b38b02eb7c94efb5019@cilium.io>

cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium,cilium/cilium