Remove 'is is' typo in book

Signed-off-by: killianmuldoon <[email protected]>

Author: killianmuldoon

docs/book/src/developer/logging.md

@@ -163,7 +163,7 @@ extra_args:
     - "--v=5"
     - "--logging-format=json"
 ```
-The above options can be combined with other settings from our [Tilt](tilt.md) setup. Once Tilt is is up and running with these settings users will be able to browse logs using the Grafana Explore UI. 
+The above options can be combined with other settings from our [Tilt](tilt.md) setup. Once Tilt is up and running with these settings users will be able to browse logs using the Grafana Explore UI. 
 
 This will normally be available on `localhost:3001`. To explore logs from Loki, open the Explore interface for the DataSource 'Loki'. [This link](http://localhost:3001/explore?datasource%22:%22Loki%22) should work as a shortcut with the default Tilt settings.