Update CHANGELOG.md for v1.48.0 release (#876)

Author: Uk1288

CHANGELOG.md

@@ -1,13 +1,6 @@
 # Unreleased
 
-## Enhancements
-
-* Adds `Variables` relationship field to `Workspace` by @arybolovlev [#872](https://github.com/hashicorp/go-tfe/pull/872)
-
-# v1.47.1
-
-## Bug fixes
-* Change the error message for `ErrWorkspaceStillProcessing` to be the same error message returned by the API by @uturunku1 [#864](https://github.com/hashicorp/go-tfe/pull/864)
+# v1.48.0
 
 ## Features
 *For Terraform Enterprise users who have data retention policies defined on Organizations or Workspaces: A new DataRetentionPolicyChoice relation has been added to reflect that [data retention policies are polymorphic](https://developer.hashicorp.com/terraform/enterprise/api-docs/data-retention-policies#data-retention-policy-types). Organizations and workspaces may be related to a `DataRetentionPolicyDeleteOlder` or `DataRetentionPolicyDontDelete` record through the `DataRetentionPolicyChoice` struct. Data retention policies can be read using `ReadDataRetentionPolicyChoice`, and set or updated (including changing their type) using `SetDataRetentionPolicyDeleteOlder` or `SetDataRetentionPolicyDontDelete` by  @JarrettSpiker [#652](https://github.com/hashicorp/go-tfe/pull/844)
@@ -17,6 +10,14 @@
 * The `SetDataRetentionPolicy` function on `Organizations` and `Workspaces` is now deprecated in favour of `SetDataRetentionPolicyDeleteOlder` or `SetDataRetentionPolicyDontDelete`. `SetDataRetentionPolicy` will only update the data retention policy when communicating with TFE versions v202311 and v202312. @JarrettSpiker [#652](https://github.com/hashicorp/go-tfe/pull/844)
 * The `ReadDataRetentionPolicy` function on `Organizations` and `Workspaces` is now deprecated in favour of `ReadDataRetentionPolicyChoice`. `ReadDataRetentionPolicyChoice` may return the different multiple data retention policy types added in TFE 202401-1. `SetDataRetentionPolicy` will only update the data retention policy when communicating with TFE versions v202311 and v202312. @JarrettSpiker [#652](https://github.com/hashicorp/go-tfe/pull/844)
 
+## Enhancements
+* Adds `Variables` relationship field to `Workspace` by @arybolovlev [#872](https://github.com/hashicorp/go-tfe/pull/872)
+
+# v1.47.1
+
+## Bug fixes
+* Change the error message for `ErrWorkspaceStillProcessing` to be the same error message returned by the API by @uturunku1 [#864](https://github.com/hashicorp/go-tfe/pull/864)
+
 # v1.47.0
 
 ## Enhancements