Add ssh-keyscan. Start ssh-agent for cargo.

limbo/limbo-just-build.yaml

@@ -18,6 +18,7 @@ spec:
       ssh-keyscan -H -p 2222 git.jpace121.net >> ~/.ssh/known_hosts
       # Use just to run the ci steps.
       source ~/.cargo/env
+      export CARGO_NET_GIT_FETCH_WITH_CLI=true
       cd $(workspaces.source.path)
       just ci-build
       just ci-test