revert tf version constraint callout

Author: Maed223

website/docs/index.html.markdown

@@ -16,7 +16,7 @@ Use the navigation to the left to read about the available resources.
 
 Since v0.24.0, this provider requires Terraform >= 0.12.
 
-~> **Important:** Since v0.71.0, this provider requires Terraform >= 1.0.
+~> **Important:** Since v0.70.0, this provider requires Terraform >= 1.0.
 
 ~> **Important:** For production use, you should constrain the acceptable provider versions via configuration,
 to ensure that new versions with breaking changes will not be automatically installed.