fix: Resolve Earthfile line 0:0 target docker not found when building audi | NPG-000 (#547)

# Description

The readme to **Audit The Tally** instructs to run `earthly +build &&
earthly +docker` when it should be `earthly +build && earthly
+docker-local`.

Creating a pr because other core tools follows the _docker-local_
convention.

## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)

Co-authored-by: Oleksandr Prokhorenko <[email protected]>
Co-authored-by: Steven Johnson <[email protected]>

Author: 3 people

src/audit/balance/README.md

@@ -15,7 +15,7 @@ MOUNT_PATH=/tmp/fund9-leader-1:/leader1stuff
 HISTORICAL_STATE=/leader1stuff/persist/leader-1
 BLOCK_0=/leader1stuff/artifacts/block0.bin
 
-earthly +build && earthly +docker
+earthly +build && earthly +docker-local
 docker run  --net=host -v $MOUNT_PATH --env STORAGE_PATH=$HISTORICAL_STATE --env GENESIS_PATH=$BLOCK_0 jormungandr
 ```
 
@@ -37,4 +37,4 @@ curl http://127.0.0.1:10000/api/v0/vote/active/plans > activevoteplans.json
 ##### Make sure the jormungandr container has been stopped once you have successfully retrieved the results. 
 ```bash
 sudo docker docker stop $JORMUNGANDR_CONTAINER_ID
-```
+```