Added a missing comma on backends.mdx

website/docs/language/state/backends.mdx

@@ -28,7 +28,7 @@ sensitive values are in your state, using a remote backend allows you to use
 Terraform without that state ever being persisted to disk.
 
 In the case of an error persisting the state to the backend, Terraform will
-write the state locally. This is to prevent data loss. If this happens the
+write the state locally. This is to prevent data loss. If this happens, the
 end user must manually push the state to the remote backend once the error
 is resolved.