yaml format in readme

README.md

@@ -116,8 +116,8 @@ options:
 
 You can use a configuration file instead of passing all arguments on the command line. If you create a file called `cog-safe-push.yaml` in your Cog directory, it will be used. Any command line arguments you pass will override the values in the config file.
 
-```
-$ cog-safe-push --help-config
+```yaml
+# cog-safe-push --help-config
 model: <model>
 predict:
   compare_outputs: true