Merge pull request GoogleCloudPlatform#2750 from GoogleCloudPlatform/…

…maqiuyujoyce-1-123-release-note

Update release-1.123.md with announcement about state-into-spec absent

docs/releasenotes/release-1.123.md

@@ -8,6 +8,15 @@
   contributions to this release.
 TODO: list contributors with `git log v1.122.0... | grep Merge | grep from | awk '{print $6}' | cut -d '/' -f 1 | sort | uniq`
 
+## Announcement
+
+* Starting from this version, all the new CRs (CustomResources) will have the `cnrm.cloud.google.com/state-into-spec`
+  annotation defaulted to `absent`. This means Config Connector will not populate any unspecified fields into the
+  `spec` after a successful reconciliation of the resource. The behavior of existing CRs will not be impacted. More
+  details about the Absent behavior can be found
+  [here](https://cloud.google.com/config-connector/docs/concepts/ignore-unspecified-fields#absent).
+
+
 ## Direct Cloud Reconciler:
 
 * `BigQueryDataTransferConfig` (v1alpha1)