SDK 3.39.0: Adds version bump and changelog. (#4391)

* SDK 3.40.0-preview.0: Adds version bump and changelog.

* SDK 3.40.0-preview.0: Adds version bump and changelog.

* SDK 3.40.0-preview.0: Adds version bump and changelog.

* change version for release; create diffs

* added query PRs to changelog

* add note for Rename refactoring of ChangeFeedItemChange<T> to changelog

* removing 4281 since it was mislabeled. it should have been treated as Internal

* grammar error

* formatting

* case change

* Update changelog.md

Co-authored-by: Justine Cocchi <jucocchi@microsoft.com>

* removing 4317 from change log. should be internal

* add new regions to changelog. also Direct Package version update

* fixed linked to DP PR

* more changes based on review

---------

Co-authored-by: Justine Cocchi <jucocchi@microsoft.com>

Directory.Build.props

@@ -1,8 +1,8 @@
 <Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
 	<PropertyGroup>
-		<ClientOfficialVersion>3.38.1</ClientOfficialVersion>
-		<ClientPreviewVersion>3.39.0</ClientPreviewVersion>
-		<ClientPreviewSuffixVersion>preview.1</ClientPreviewSuffixVersion>
+		<ClientOfficialVersion>3.39.0</ClientOfficialVersion>
+		<ClientPreviewVersion>3.40.0</ClientPreviewVersion>
+		<ClientPreviewSuffixVersion>preview.0</ClientPreviewSuffixVersion>
 		<DirectVersion>3.33.1</DirectVersion>
 		<EncryptionOfficialVersion>2.0.4</EncryptionOfficialVersion>
 		<EncryptionPreviewVersion>2.1.0</EncryptionPreviewVersion>