Updates deprecation documentation

Author: gdavison

website/docs/language/upgrade-guides/index.mdx

@@ -136,16 +136,16 @@ The `run` block also applies or plans the main configuration by default, there i
 
 ## S3 Backend
 
-The S3 Backend has been updated, with a number of added and deprecated fields.
-These changes bring the S3 Backend configuration closer to the AWS Provider configuration.
-
-### Deprecations
+We updated the S3 backend in Terraform 1.6.0 so that it more closely matches the AWS provider configuration.
+As a result, the backend has new and deprecated fields.
+Refer to the [release notes](https://github.com/hashicorp/terraform/releases/tag/v1.6.0) for additional information. 
 
 The major deprecations are discussed here.
-For more information, consult the [S3 Backend documentation](/terraform/language/settings/backends/s3).
+Refer to the [S3 backend documentation](/terraform/language/settings/backends/s3) for information about all deprecations.
+
+We removed the configuration for assuming an IAM role from several top-level attributes and consolidated them into the `assume_role` attribute.
 
-Configuration for assuming an IAM Role has been moved from a number of top-level attributes into the attribute `assume_role`.
-Previously, the configuration to assume the IAM role `arn:aws:iam::123456789012:role/example` with a session name `example-session` and a session duration of 15 minutes was:
+The following example shows the configuration in Terraform 1.5.6 and older for assuming the IAM role `arn:aws:iam::123456789012:role/example` with a session name `example-session` and a session duration of 15 minutes:
 
 ```hcl
 terraform {
@@ -158,7 +158,7 @@ terraform {
 }
 ```
 
-The updated configuration is:
+The configuration in Terraform 1.6.0 is:
 
 ```hcl
 terraform {
@@ -173,13 +173,17 @@ terraform {
 }
 ```
 
-The AWS API endpoint override attributes
-`endpoint` (for S3),
-`dynamodb_endpoint`,
-`iam_endpoint`, and
-`sts_endpoint`
-have been replaced with the attributes `endpoints` and the corresponding nested attributes
-`s3`,
-`dynamodb`,
-`iam`, and
-`sts`.
+We removed the configuration for overriding AWS API endpoints from several top-level attributes and consolidated them into the `endpoints` attribute.
+The following endpoint attributes are now nested under the `endpoint` attribute:
+
+- `s3`
+- `dynamodb`
+- `iam`
+- `sts`
+
+The `endpoint` attribute replaces the following top-level attributes:
+
+- `endpoint` (for S3),
+- `dynamodb_endpoint`,
+- `iam_endpoint`
+- `sts_endpoint`