Update vulnerable log4net

Author: shibaev

Samples/General operations/LoggingWithLog4Net/C#/LoggingWithLog4Net.csproj

@@ -8,7 +8,7 @@
   <ItemGroup>
     <PackageReference Include="BitMiracle.Docotic.Pdf" Version="9.8.18634" />
     <PackageReference Include="BitMiracle.Docotic.Pdf.Logging" Version="9.8.18634" />
-    <PackageReference Include="log4net" Version="2.0.15" />
+    <PackageReference Include="log4net" Version="3.3.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Log4Net.AspNetCore" Version="8.0.0" />
   </ItemGroup>
   <Target Name="PostBuild" AfterTargets="PostBuildEvent">

Samples/General operations/LoggingWithLog4Net/VB.NET/LoggingWithLog4Net.vbproj

@@ -7,7 +7,7 @@
   <ItemGroup>
     <PackageReference Include="BitMiracle.Docotic.Pdf" Version="9.8.18634" />
     <PackageReference Include="BitMiracle.Docotic.Pdf.Logging" Version="9.8.18634" />
-    <PackageReference Include="log4net" Version="2.0.15" />
+    <PackageReference Include="log4net" Version="3.3.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Log4Net.AspNetCore" Version="8.0.0" />
   </ItemGroup>
   <Target Name="PostBuild" AfterTargets="PostBuildEvent">