docs: fix typo in filtering example for prometheus-exporter
@@ -19,7 +19,7 @@ to match on datapoints to determine whether to drop them. For example:
```yaml
monitors:
# Prometheus node exporter scraper
- - type: promtheus-exporter
+ - type: prometheus-exporter
host: 127.0.0.1
port: 9090
datapointsToExclude:
