chore(deps): update dependency microsoft.data.sqlclient to v6

Author: renovate-bot

cloud-sql/sql-server/CloudSql.csproj

@@ -6,7 +6,7 @@
 
   <ItemGroup>
     <PackageReference Include="Google.Cloud.Diagnostics.AspNetCore3" Version="5.2.0" />
-    <PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
+    <PackageReference Include="Microsoft.Data.SqlClient" Version="6.0.0" />
     <PackageReference Include="Polly" Version="8.5.1" />
   </ItemGroup>