cerbero: Fix indentation of cache command
cerbero: Fix indentation of cache command

Part-of: <https://gitlab.freedesktop.org/gstreamer/cerbero/-/merge_requests/608>

GStreamer/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero,nirbheek/cerbero,nirbheek/cerbero,GStreamer/cerbero,GStreamer/cerbero,nirbheek/cerbero