test/k8sT: use specific commit for cilium/star-wars-demo YAMLs
test/k8sT: use specific commit for cilium/star-wars-demo YAMLs

A recent commit moved location of files in the cilium/star-wars-demo repository.
This broke the CI tests because they assumed the files were at a specific
location. Hardcode the base link to GitHub to a specific commit to get the files
for running the test instead of pointing to master.

Signed-off by: Ian Vernon <ian@cilium.io>

michi-covalent/cilium,scanf/cilium,tgraf/cilium,cilium/cilium,scanf/cilium,cilium/cilium,michi-covalent/cilium,tgraf/cilium,cilium-team/cilium,cilium/cilium,tgraf/cilium,tklauser/cilium,cilium/cilium,michi-covalent/cilium,scanf/cilium,tgraf/cilium,tklauser/cilium,tgraf/cilium,tklauser/cilium,cilium/cilium,tklauser/cilium,scanf/cilium,cilium-team/cilium,scanf/cilium,tgraf/cilium,michi-covalent/cilium,michi-covalent/cilium,scanf/cilium,tklauser/cilium,scanf/cilium