Update README.md

Updating the root-level README.md file so that it contains the same updates recently made to `purity_fb/README.md`

README.md

@@ -4,7 +4,7 @@ Pure Storage FlashBlade REST 1.9 Python SDK. Compatible with REST API versions 1
 This Python package is automatically generated by the [Swagger Codegen](https://github.com/swagger-api/swagger-codegen) project:
 
 - API version: 1.9
-- Package version: 1.9.0
+- Package version: 1.9.1
 - Build package: io.swagger.codegen.languages.PythonClientCodegen
 For more information, please visit [http://www.purestorage.com](http://www.purestorage.com)
 
@@ -56,7 +56,7 @@ import purity_fb
 Please follow the [installation procedure](#installation--usage) and then run the following:
 
 ```python
-from purity_fb import PurityFb, FileSystem, FileSystemSnapshot, SnapshotSuffix, rest
+from purity_fb import PurityFb, FileSystem, FileSystemPost, FileSystemSnapshot, SnapshotSuffix, rest
 
 # create PurityFb object for a certain array
 fb = PurityFb("10.255.8.20")
@@ -67,7 +67,7 @@ try:
     fb.login("T-e7e551be-fe5d-4669-baf5-670cd8ea0560")
 
     ## manage file systems
-    fs_obj = FileSystem(name="myfs", provisioned=50000)
+    fs_obj = FileSystemPost(name="myfs", provisioned=50000)
     # create a file system named myfs
     fb.file_systems.create_file_systems(fs_obj)
     # list all existing file systems
@@ -338,8 +338,8 @@ at most 20 retries in total, among which at most 15 connection retries and at mo
  - [PolicyMemberWithRemoteResponse](docs/PolicyMemberWithRemoteResponse.md)
  - [PolicyObjects](docs/PolicyObjects.md)
  - [PolicyObjectsResponse](docs/PolicyObjectsResponse.md)
- - [PolicyPatch](docs/PolicyPatch.md)
  - [PolicyReference](docs/PolicyReference.md)
+ - [PolicyPatch](docs/PolicyPatch.md)
  - [PolicyReferenceWithId](docs/PolicyReferenceWithId.md)
  - [PolicyResponse](docs/PolicyResponse.md)
  - [PolicyRule](docs/PolicyRule.md)