Make changelog pretty
#### :nail_care: Enhancement
- New artifact cli commands!
-> wandb artifact put path_file_or_ref
-> wandb artifact get artifact:version
-> wandb artifact ls project_name
+```shell
+wandb artifact put path_file_or_ref
+wandb artifact get artifact:version
+wandb artifact ls project_name
+```
- New artifact api commands!
```python
wandb.log_artifact()
