Update README.md

Author: l4rm4nd

examples/grafana-monitoring/README.md

@@ -8,7 +8,7 @@
 Spawning up this docker stack will provide you with:
 
 - A containerized Grafana web instance runnning on the default port TCP/3000
-- A containerized Telegraf instances that fetches data points from your docker host server
+- A containerized Telegraf instance that fetches data points from your docker host server
 - A containerized InfluxDB instance for storing Telegraf data, which can be defined in Grafana as datasource (just specify `http://influxdb:8086`). Default database is `telegraf`. Default username is `telegrafuser`. Default password is `MyStrongTelegrafPassword`. Defaults can be changed in `/volume-data/influxdb/init/create-database.iql`.
 - A containerized Promtail instance that can fetch various log files (bind mounted into the promtail container from your docker host server) and send them into the Loki container (e.g. /var/log/auth.log or your Traefik reverse proxy logs)
 - A containerized Loki instance for storing Promtail log data, which can be defined in Grafana as datasource (just specify `http://loki:3100`). No authentication enabled per default.