fix docs typos (#20)

README.md

@@ -14,7 +14,7 @@ or
 pip install block-cascade
 ```
 
-### Example Usage in a Prefect flow
+### Example Usage
 
 ```python
 from block_cascade import remote
@@ -76,8 +76,6 @@ Cascade supports creating persistent resources in GCP. These resources can be re
 
 You can create a persistent resource using the `cascade` CLI and suppling a `cascade.yml` with a configuration block that contains a `persistent_resource_id` field. This field will be used to identify the persistent resource when submitting tasks to it. It is recommended that you use the configuration file to define the resource as well as the tasks that will be submitted to it. This will ensure that the resource specified for your task is compatible with the shape of the persistent resource. 
 
-```yaml
-
 ```yaml
 persistent-resource:
   type: GcpResource