CHANGELOG: add changelog for Packer 1.9.2

CHANGELOG.md

@@ -1,4 +1,61 @@
-## 1.9.2 (Upcoming)
+## 1.9.2 (July 19, 2023)
+
+### NOTES:
+
+* Vendored plugins within Packer have not been updated. Plugin releases occur on
+     a regular basis to address issues and feature requests.
+     Please note that in an upcoming version of Packer, we will remove the last
+     bundled plugins from Packer.
+     Users are encouraged to use `packer init` for HCL2 templates or
+     `packer plugins install` with legacy JSON templates for installing external
+     plugins.
+
+* Packer will now warn when using bundled plugins. This feature will be removed in
+    a future version of the tool, so this warning is meant to bring awareness of the
+    upcoming change, and to help users update their environment/templates to be
+    ready for this.
+    [GH-12495](https://github.com/hashicorp/packer/pull/12495)
+
+### BUG FIXES:
+
+* Fixed a bug with how Packer was discovering plugins: in order to load
+     plugins, Packer would recursively scan all the known directories in which
+     we could have installed plugins. This caused unnecessary directory
+     walks and slowdowns upon invocation. Packer will now only check
+     for nested plugins within the directories used by commands such as `packer
+     init`, or `packer plugins install`, or as defined in PACKER_PLUGIN_PATH.
+     Refer to
+     [Packer's plugin directory documentation](https://developer.hashicorp.com/packer/docs/configure#packer-s-plugin-directory)
+     for details on how loading works.
+     [GH-12414](https://github.com/hashicorp/packer/pull/12414)
+
+* The `packer init` subcommand now bundles all the missing installed plugins into one
+    condensed warning, as opposed to one warning per missing plugin.
+    [GH-12506](https://github.com/hashicorp/packer/pull/12506)
+
+### PLUGINS:
+
+* packer-plugin-parallels: The Parallels plugin has been handed over to the Parallels
+     team. New releases for this plugin are available at
+     https://github.com/parallels/packer-plugin-parallels. This plugin is is no longer
+     being bundled in the Packer binary release. Existing references to the
+     plugin will continue to work but users are advised to update the
+     `required_plugins` block to use the new plugin source address.
+    [GH-12476](https://github.com/hashicorp/packer/pull/12476)
+    ```
+     required_plugins {
+       parallels = {
+         source  =  "github.com/parallels/parallels"
+         version =  "~> 1"
+        }
+    }
+    ```
+
+### IMPROVEMENTS:
+
+* The `hcl2_upgrade` subcommand will now add `required_plugins` to the template
+    generated from JSON for all our officially supported plugins.
+    [GH-12504](https://github.com/hashicorp/packer/pull/12504)
 
 ## 1.9.1 (June 1, 2023)