Bump log4net from 2.0.8 to 2.0.10 in /test/API.Test

Bumps [log4net](https://github.com/apache/logging-log4net) from 2.0.8 to 2.0.10.
- [Release notes](https://github.com/apache/logging-log4net/releases)
- [Changelog](https://github.com/apache/logging-log4net/blob/master/ReleaseInstructions.txt)
- [Commits](apache/logging-log4net@rel/2.0.8...rel/2.0.10)

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Author: dependabot[bot]

test/API.Test/packages.config

@@ -9,7 +9,7 @@
   <package id="Google.Apis" version="1.49.0" targetFramework="net472" />
   <package id="Google.Apis.Auth" version="1.49.0" targetFramework="net472" />
   <package id="Google.Apis.Core" version="1.49.0" targetFramework="net472" />
-  <package id="log4net" version="2.0.8" targetFramework="net472" />
+  <package id="log4net" version="2.0.10" targetFramework="net472" />
   <package id="Microsoft.Bcl.AsyncInterfaces" version="1.0.0" targetFramework="net472" />
   <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="2.0.1" targetFramework="net472" />
   <package id="Microsoft.Net.Compilers" version="2.10.0" targetFramework="net472" developmentDependency="true" />