Docs: revise block names (ring and filesystem) and correct spelling (#5015)
Docs: revise block names (ring and filesystem) and correct spelling (#5015)

* Docs: revise block names (ring and filesystem) and correct spelling

* Docs: scheduler_ring and compactor_ring point to ring config
   Change made per review comment.
grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki,grafana/loki