ci: make code-intel-qa fetch latest src-cli release
Created by: jhchabran
The codeintel-qa script was not getting the updated src-cli version, leading to problems.
Test plan
Dry run here: https://buildkite.com/sourcegraph/sourcegraph/builds/160429#0181f8f1-a309-4104-a5f8-c133c3980efd/112-121 which got us the right version.