Update CHANGELOG for 1.8.6 and 1.9.0

CHANGELOG.md

@@ -1,27 +1,24 @@
-## 1.8.6 (Upcoming)
+## 1.9.0 (Unreleased)
+### NOTES:
+* **Breaking Change**: Iteration fingerprints used to be computed from the Git SHA of the
+     repository where the template is located when running packer build. This
+     changes with this release, and now fingerprints are automatically generated
+     as a ULID. This implies that continuing an existing iteration will require
+     users to define the fingerprint in the environment manually in order to
+     adopt this behaviour, otherwise, by default, a new iteration will be
+     created. This does not impact workflows where the fingerprint was defined
+     through the HCP_PACKER_ITERATION_FINGERPRINT environment variable, and
+     these builds will work exactly as they did before.
+     [GH-12172](https://github.com/hashicorp/packer/pull/12172)
 
 ### IMPROVEMENTS:
-* bump github.com/hashicorp/hcp-sdk-go from 0.28.0 to 0.29.0.
-     [GH-12163](https://github.com/hashicorp/packer/pull/12163)
-* hcp: iteration fingerprints used to be computed from the Git SHA of the repository
-       where the template is located when running packer build. This changes with this
-       release, and now fingerprints are automatically generated as a ULID. This implies
-       that continuing an existing iteration will require users to define the
-       fingerprint in the environment manually in order to adopt this behaviour,
-       otherwise, by default, a new iteration will be created. This does not impact
-       workflows where the fingerprint was defined through the
-       HCP_PACKER_ITERATION_FINGERPRINT environment variable, and these builds will work
-       exactly as they did before.
 
-### BUG FIXES: 
-* core/hcl2: Templates with build blocks referencing an unknown source block
-     would display an empty string for the template filename at line 0, which made
-     it difficult to identify the broken build block. Packer has been updated to
-     display the proper filename and line number where the unknown reference
-     resides. [GH-12167](https://github.com/hashicorp/packer/pull/12167)
-* core: Linux packages now have vendor label and set the default label to HashiCorp.
-        This fix is implemented for any future releases, but will not be 
-        updated for historical releases.
+* core/hcp: Now, fingerprints used by HCP Packer are randomly generated ULIDs
+     instead of a Git SHA, and a new one is always generated, unless one is
+     already specified in the environment.
+     [GH-12172](https://github.com/hashicorp/packer/pull/12172)
+
+## 1.8.6 (Unreleased)
 
 ### NOTES:
 * core: Users will see some changes in how names are displayed during a Packer
@@ -31,6 +28,26 @@
      "<type>.mybuilder". This does not impact the behavior of options such as
      only or except, they will continue to work as they did before.)
 
+### IMPROVEMENTS:
+* bump github.com/hashicorp/hcp-sdk-go from 0.28.0 to 0.29.0.
+     [GH-12163](https://github.com/hashicorp/packer/pull/12163)
+* core/hcl2: Packer will no longer warn on excluded post-processors when using
+     `-only/exlude` filters for running select builds.
+     [GH-12187](https://github.com/hashicorp/packer/pull/12187)
+
+### BUG FIXES: 
+* cmd/hcl2_upgrade: Fix crash when variables block is undefined.
+     [GH-12250](https://github.com/hashicorp/packer/pull/12250)
+* core/hcl2: Templates with build blocks referencing an unknown source block
+     would display an empty string for the template filename at line 0, which
+     made it difficult to identify the broken build block. Packer has been
+     updated to display the proper filename and line number where the unknown
+     reference resides.
+     [GH-12167](https://github.com/hashicorp/packer/pull/12167)
+* core: Linux packages now have vendor label and set the default label to
+     HashiCorp. This fix is implemented for any future releases, but will not be
+     updated for historical releases.
+
 ## 1.8.5 (December 12, 2022)
 
 ### NOTES: