Update loki.source.api.md (#594)

The /loki/ready endpoint does not seem to be a valid one. Instead should be /ready as stated here: https://github.com/grafana/alloy/blob/main/internal/component/loki/source/api/internal/lokipush/push_api_server.go#L78 and here https://grafana.com/docs/loki/latest/reference/api/#status-endpoints

docs/sources/reference/components/loki.source.api.md

@@ -30,7 +30,7 @@ The component will start HTTP server on the configured port and address with the
 
 - `/loki/api/v1/push` - accepting `POST` requests compatible with [Loki push API][loki-push-api], for example, from another {{< param "PRODUCT_NAME" >}}'s [`loki.write`][loki.write] component.
 - `/loki/api/v1/raw` - accepting `POST` requests with newline-delimited log lines in body. This can be used to send NDJSON or plaintext logs. This is compatible with promtail's push API endpoint - see [promtail's documentation][promtail-push-api] for more information. NOTE: when this endpoint is used, the incoming timestamps cannot be used and the `use_incoming_timestamp = true` setting will be ignored.
-- `/loki/ready` - accepting `GET` requests - can be used to confirm the server is reachable and healthy.
+- `/ready` - accepting `GET` requests - can be used to confirm the server is reachable and healthy.
 - `/api/v1/push` - internally reroutes to `/loki/api/v1/push`
 - `/api/v1/raw` - internally reroutes to `/loki/api/v1/raw`