docs: fix typos in observability.md (#16186)

Author: mutestt

book/run/observability.md

@@ -104,7 +104,7 @@ Start-Service prometheus
 Start-Service grafana
 ```
 
-This will start a Prometheus service which [by default scrapes itself about the current instance](https://prometheus.io/docs/introduction/first_steps/#:~:text=The%20job%20contains%20a%20single,%3A%2F%2Flocalhost%3A9090%2Fmetrics.). So you'll need to change its config to hit your Reth nodes metrics endpoint at `localhost:9001` which you set using the `--metrics` flag.
+This will start a Prometheus service which [by default scrapes itself about the current instance](https://prometheus.io/docs/introduction/first_steps/#:~:text=The%20job%20contains%20a%20single,%3A%2F%2Flocalhost%3A9090%2Fmetrics.). So you'll need to change its config to hit your Reth node’s metrics endpoint at `localhost:9001` which you set using the `--metrics` flag.
 
 You can find an example config for the Prometheus service in the repo here: [`etc/prometheus/prometheus.yml`](https://github.com/paradigmxyz/reth/blob/main/etc/prometheus/prometheus.yml)
 
@@ -122,7 +122,7 @@ As this might be a point of confusion, `localhost:9001`, which we supplied to `-
 
 To configure the dashboard in Grafana, click on the squares icon in the upper left, and click on "New", then "Import". From there, click on "Upload JSON file", and select the example file in [`reth/etc/grafana/dashboards/overview.json`](https://github.com/paradigmxyz/reth/blob/main/etc/grafana/dashboards/overview.json). Finally, select the Prometheus data source you just created, and click "Import".
 
-And voilá, you should see your dashboard! If you're not yet connected to any peers, the dashboard will look like it's in an empty state, but once you are, you should see it start populating with data.
+And voilà, you should see your dashboard! If you're not yet connected to any peers, the dashboard will look like it's in an empty state, but once you are, you should see it start populating with data.
 
 ## Conclusion