fix: bump opencode submodule — fix oauth-browser test race condition on macOS CI

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: pRizz

packages/core/src/docker/Dockerfile

@@ -525,7 +525,7 @@ COPY --chown=opencoder:opencoder packages/opencode /tmp/opencode-local
 # Update it by running: ./scripts/update-opencode-commit.sh
 RUN set -eux; \
     OPENCODE_COMMIT_OVERRIDE="${OPENCODE_COMMIT:-}"; \
-    OPENCODE_COMMIT="b40a0a2b15a76e74292f0661689d294bc237a343"; \
+    OPENCODE_COMMIT="efa4328214df5adefce315d86bfafbbfebd885ac"; \
     if [ -n "${OPENCODE_COMMIT_OVERRIDE}" ]; then OPENCODE_COMMIT="${OPENCODE_COMMIT_OVERRIDE}"; fi; \
     rm -rf /tmp/opencode-repo; \
     if [ "${OPENCODE_SOURCE}" = "local" ]; then \