fix the init_container resource description.

The behavior of `init_container` should be the same as the behavior of `container` in `azurerm_container_app`.

website/docs/r/container_app.html.markdown

@@ -91,7 +91,7 @@ A `secret` block supports the following:
 
 A `template` block supports the following:
 
-* `init_container` - (Optional) The definition of an init container that is part of the group as documented in the `init_container` block below. Changing this forces a new resource to be created.
+* `init_container` - (Optional) The definition of an init container that is part of the group as documented in the `init_container` block below.
 
 * `container` - (Required) One or more `container` blocks as detailed below.