Revert "Release v0.9.v0.9.1"

This reverts commit a47f6cd.

Author: KirillKurdyukov

CHANGELOG.md

@@ -1,4 +1,3 @@
-## v0.9.v0.9.1
 - Fixed bug: delete deadline grpc timeout on AttachStream
 
 ## v0.9.1

src/Ydb.Sdk/src/Version.cs

@@ -4,5 +4,5 @@ public static class Version
 {
     public const uint Major = 0;
     public const uint Minor = 9;
-    public const uint Patch = v0.9.1;
+    public const uint Patch = 1;
 }