Update CHANGELOG and fix linter

Author: KirillKurdyukov

slo/src/AdoNet/SloTableContext.cs

@@ -1,6 +1,5 @@
 using System.Data;
 using Internal;
-using Microsoft.Extensions.Logging;
 using Polly;
 using Ydb.Sdk;
 using Ydb.Sdk.Ado;

slo/src/Dapper/SloTableContext.cs

@@ -1,6 +1,5 @@
 using Dapper;
 using Internal;
-using Microsoft.Extensions.Logging;
 using Polly;
 using Ydb.Sdk;
 using Ydb.Sdk.Ado;

src/Ydb.Sdk/CHANGELOG.md

@@ -1,3 +1,5 @@
+- Dev: LogLevel `Warning` -> `Debug` on DeleteSession has been `RpcException`.
+
 ## v0.22.0
 
 - Added `YdbDbType` property to `YdbParameter`, allowing to explicitly specify YDB-specific data types for parameter mapping.