Update README.md

Fixed two broken links

README.md

@@ -34,8 +34,8 @@ Once you have promtail, Loki, and Grafana running, continue with [our usage docs
 
 ### Documentation
 
-- [API documentation](./docs/api.md) for alternative ways of getting logs into Loki.
-- [Operations](./docs/operations.md) for important aspects of running Loki.
+- [API documentation](./docs/loki/api.md) for alternative ways of getting logs into Loki.
+- [Operations](./docs/loki/operations.md) for important aspects of running Loki.
 - [Promtail](./docs/promtail.md) is an agent which can tail your log files and push them to Loki.
 - [Processing Log Lines](./docs/logentry/processing-log-lines.md) for detailed log processing pipeline documentation
 - [Docker Logging Driver](./cmd/docker-driver/README.md) is a docker plugin to send logs directly to Loki from Docker containers.