Only publish main acp crate for now (#16)

Author: benbrandt

.github/workflows/publish.yml

@@ -20,7 +20,7 @@ jobs:
         uses: obi1kenobi/cargo-semver-checks-action@5b298c9520f7096a4683c0bd981a7ac5a7e249ae
       - uses: rust-lang/crates-io-auth-action@e919bc7605cde86df457cf5b93c5e103838bd879
         id: auth
-      - run: cargo publish
+      - run: cargo publish -p agent-client-protocol
         env:
           CARGO_REGISTRY_TOKEN: ${{ steps.auth.outputs.token }}