fix: update docs sync target from techops-services to KeeperHub org

[eskp]

Summary

• sync-cli-docs.yml was checking out techops-services/keeperhub instead of KeeperHub/keeperhub

Action needed after merge

Verify KEEPERHUB_PAT and HOMEBREW_TAP_TOKEN secrets have access to the KeeperHub org:

• If fine-grained PATs scoped to techops-services, regenerate scoped to KeeperHub
• If classic PATs owned by a KeeperHub org member, they likely already work

Test plan

• Trigger sync-cli-docs workflow manually after merge
• Verify PR is created in KeeperHub/keeperhub (not techops-services/keeperhub)