Bump log4net from 2.0.14 to 3.3.0 (#3731)

---
updated-dependencies:
- dependency-name: log4net
  dependency-version: 3.3.0
  dependency-type: direct:production
...

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lang/csharp/src/apache/ipc/Avro.ipc.csproj

@@ -30,7 +30,7 @@
 
   <ItemGroup>
     <PackageReference Include="castle.core" Version="4.2.1" />
-    <PackageReference Include="log4net" Version="2.0.14" />
+    <PackageReference Include="log4net" Version="3.3.0" />
   </ItemGroup>
 
   <ItemGroup>