CI flake: Docs build #5749

Detected by CI Gremlin after a failed GitHub Actions attempt succeeded on rerun.

Tests:

• Docs build

Error:
Error: command ["pnpm", "build"] exited with code <signal 11>
2026-08-12T16:56:05.6500431Z

Failed job runs:

• https://github.com/clockworklabs/SpacetimeDB/actions/runs/31619897941/job/94191837867 (Docs build, attempt 1 -> 2)

Timeout detection:

• none

Context:

• none