[Internal] Document transition to new release infrastructure (#4436)

## Changes
<!-- Summary of your changes that are easy to understand -->

## Tests
<!-- 
How is this tested? Please see the checklist below and also describe any
other relevant tests
-->

- [ ] `make test` run locally
- [ ] relevant change in `docs/` folder
- [ ] covered with integration tests in `internal/acceptance`
- [ ] using Go SDK
- [ ] using TF Plugin Framework

Author: mgyucht

CHANGELOG.md

@@ -6,6 +6,7 @@
 
  * Add `no_compute` attribute to `databricks_app` ([#4364](https://github.com/databricks/terraform-provider-databricks/pull/4364)).
  * Skip calling Read after Create/Update operations for `databricks_notebook` ([#4173](https://github.com/databricks/terraform-provider-databricks/pull/4173)).
+ * Updated AWS UC storage credential to include permissions for file events ([#4406](https://github.com/databricks/terraform-provider-databricks/pull/4406)).
 
 
 ### Bug Fixes

NEXT_CHANGELOG.md

@@ -1,14 +1,17 @@
 # NEXT CHANGELOG
 
-## Release v1.64.0
+## Release v1.64.1
 
 ### New Features and Improvements
 
 ### Bug Fixes
 
 ### Documentation
 
+ * Fix attribute name in `databricks_instance_profile` examples ([#4426](https://github.com/databricks/terraform-provider-databricks/pull/4426)).
+
 ### Exporter
 
 ### Internal Changes
 
+ * Started to use the new release framework for releases of the Terraform provider.