Update plugin README and rST index with DF modules (#14)

Signed-off-by: Webster Mudge <[email protected]>

Author: wmudge

docsrc/index.rst

@@ -14,6 +14,8 @@ cloudera.cloud Ansible Collection
    datahub_cluster <datahub_cluster>
    datahub_cluster_info <datahub_cluster_info>
    datahub_template_info <datahub_template_info>
+   df <df>
+   df_info <df_info>
    dw_cluster <dw_cluster>
    dw_cluster_info <dw_cluster_info>
    env <env>

plugins/README.md

@@ -16,6 +16,8 @@ modules employ the underlying SDK contained within the `cdpy` Python package.
 | [datalake](./modules/datalake.py) | Create, manage, and destroy CDP Datalakes |
 | [datalake_info](./modules/datalake_info.py) | Gather information about CDP Datalakes |
 | [datalake_runtime_info](./modules/datalake_runtime_info.py) | Gather information about CDP Datalake Runtimes |
+| [df](./modules/df.py) | Enable or disable CDP DataFlow services |
+| [df_info](./modules/df_info.py) | Gather information about CDP DataFlow services |
 | [dw_cluster](./modules/dw_cluster.py) | Create, manage, and destroy CDP Data Warehouse experiences |
 | [dw_cluster_info](./modules/dw_cluster_info.py) | Gather information about CDP Data Warehouse experiences |
 | [env](./modules/env.py) | Create, manage, and destroy CDP Environments |