Bump Serilog.Sinks.PeriodicBatching from 4.0.1 to 4.1.0 (#202)

Bumps [Serilog.Sinks.PeriodicBatching](https://github.com/serilog/serilog-sinks-periodicbatching) from 4.0.1 to 4.1.0.
- [Release notes](https://github.com/serilog/serilog-sinks-periodicbatching/releases)
- [Commits](serilog/serilog-sinks-periodicbatching@v4.0.1...v4.1.0)

---
updated-dependencies:
- dependency-name: Serilog.Sinks.PeriodicBatching
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Serilog.Sinks.Splunk/Serilog.Sinks.Splunk.csproj

@@ -19,7 +19,7 @@
 
   <ItemGroup>
     <PackageReference Include="Serilog" Version="3.1.1" />
-    <PackageReference Include="Serilog.Sinks.PeriodicBatching" Version="4.0.1" />
+    <PackageReference Include="Serilog.Sinks.PeriodicBatching" Version="4.1.0" />
   </ItemGroup>
 
 </Project>