Bump the nuget-dependencies group with 1 update

Bumps the nuget-dependencies group with 1 update: [log4net](https://github.com/apache/logging-log4net).


Updates `log4net` from 2.0.15 to 2.0.16
- [Release notes](https://github.com/apache/logging-log4net/releases)
- [Changelog](https://github.com/apache/logging-log4net/blob/master/doc/ReleaseInstructions-legacy.txt)
- [Commits](apache/logging-log4net@rel/2.0.15...rel/2.0.16)

---
updated-dependencies:
- dependency-name: log4net
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: nuget-dependencies
...

Signed-off-by: dependabot[bot] <support@github.com>

src/Ookii.Jumbo/Ookii.Jumbo.csproj

@@ -21,7 +21,7 @@
 
   <ItemGroup>
     <PackageReference Include="Crc32.NET" Version="1.2.0" />
-    <PackageReference Include="log4net" Version="2.0.15" />
+    <PackageReference Include="log4net" Version="2.0.16" />
     <PackageReference Include="Ookii.BinarySize" Version="1.1.0" />
     <PackageReference Include="System.Management" Version="8.0.0" />
   </ItemGroup>