[ContainerRegistry] prepare CHANGELOG for 2021 June release (#15593)

sdk/containerregistry/container-registry/CHANGELOG.md

@@ -1,7 +1,26 @@
 # Release History
 
-## 1.0.0-beta.3 (Unreleased)
+## 1.0.0-beta.3 (2021-06-08)
 
+### Breaking Changes
+
+- Split `ContentProperties` into separate `*WriteableProperties` types because they can have different properties.
+- Add new type `ArtifactManifestPlatform` for manifest list in `ArtifactManifestProperties`. The property has been renamed to `relatedArtifacts`.
+- Flatten `writeableProperties` in `*Properties` types.
+- Rename `endpointUrl` to `endpoint` in `ContainerRegistryClient`.
+- Change known os and arch types to enum so the known values can be used in string comparisons
+- Update `*OrderBy` values from `"timeAsc"/"timeDesc"` to `"lastUpdatedOnAscending"/"lastUpdatedOnDescending"`
+- Rename `listTags` to `listTagProperties` and `listManifests` to `listManifestProperties`
+- Rename `set*Properties` function names to `update*Properties`
+
+### Features Added
+
+- Add `authenticationScope` properties to `ContainerRegistryClientOptions` to support national clouds.
+- Add `continuationToken` to paging response types.
+
+### Bug Fixes
+
+- The expiry time is now retrieved from the ACR refresh token, instead of hard-coded three hours later from `Date.now()`.
 
 ## 1.0.0-beta.2 (2021-05-11)