ci(install-proof): bind KIN_NO_SETUP to sh, not curl (FIR-1012) (#44)

`KIN_NO_SETUP=1 curl … | sh` sets the var only for curl; the piped script
never sees it and tries interactive setup against a non-controlling /dev/tty
(ubuntu). Pipe to `KIN_NO_SETUP=1 sh` so the CI/non-interactive path skips
setup. (The same correction is needed in the documented command on the kinlab
setup page / README.)

Signed-off-by: Troy Fortin <troy@firelock.io>

Author: troyjr4103

.github/workflows/install-proof.yml

@@ -30,8 +30,11 @@ jobs:
         if: runner.os != 'Windows'
         run: |
           set -eu
-          # The exact command from the README / kinlab.ai setup page.
-          KIN_NO_SETUP=1 curl -fsSL https://get.kinlab.dev/install | sh
+          # CI/non-interactive install. NOTE the env var binds to `sh`, not
+          # `curl` — `KIN_NO_SETUP=1 curl … | sh` would set it only for curl and
+          # the piped script would never see it (it would then try the
+          # interactive setup against a non-controlling /dev/tty).
+          curl -fsSL https://get.kinlab.dev/install | KIN_NO_SETUP=1 sh
           # install.sh installs to ~/.kin/bin and verifies the per-artifact sha256.
           echo "$HOME/.kin/bin" >> "$GITHUB_PATH"