perm set decomposition take 2 (#3035)

releasenotes/README.md

@@ -33,6 +33,10 @@ These changes are in the Salesforce CLI release candidate. We plan to include th
 
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+* CHANGE: We shipped `decomposePermissionSetBeta` back in [April](README.md#2368-april-10-2024), asked you to [vote on a new design of the feature](https://github.com/forcedotcom/cli/discussions/2993) (thank you), and we now have a winner! We went with option 2 (focused decomposition); see details [here](https://github.com/forcedotcom/cli/discussions/2993#discussioncomment-10431670). 
+
+   We now have a new source behavior value: `decomposePermissionSetBeta2`. If you haven't played with source decomposition at all yet, you can try it by running `sf project convert source-behavior --behavior decomposePermissionSetBeta2`. You can also use this command if you previously updated your project to use the original `decomposePermissionSetBeta` flavor, but you now want to try out the new stuff.  Enjoy! (source-deploy-retrieve PR [#1412]((https://github.com/forcedotcom/source-deploy-retrieve/pull/1412))
+
 * FIX: Deploying a sharing rule by specifying one of its child metadata types (such as `project deploy start --metadata SharingCriteriaRule:Account.Test_Rule1`) now works correctly. (source-deploy-retrieve PR [#1419](https://github.com/forcedotcom/source-deploy-retrieve/pull/1419))
 
 * FIX: Salesforce DX projects now support these [metadata types](https://github.com/forcedotcom/source-deploy-retrieve/blob/main/src/registry/metadataRegistry.json):