Fix "liquid" warning on logging plugins page
Fix "liquid" warning on logging plugins page

Noticed this warning in the documentation CI:

    Liquid Warning: Liquid syntax error (line 210): Expected end_of_string but found id in "{{ log stream }}" in engine/extend/plugins_logging.md

Signed-off-by: Sebastiaan van Stijn <64b2b6d12bfe4baae7dad3d018f8cbf6b0e7a044@gone.nl>

docker/cli,redpanda/cli,allencloud/cli,cpuguy83/cli,allencloud/cli,ashfall/cli,thaJeztah/cli,dnephin/cli,Zebrilee/cli,thaJeztah/cli,redpanda/cli,Zebrilee/cli,cpuguy83/cli,ashfall/cli,docker/cli,dnephin/cli