Bump Serilog.Sinks.PeriodicBatching from 4.1.0 to 4.1.1 (#209)

Bumps [Serilog.Sinks.PeriodicBatching](https://github.com/serilog/serilog-sinks-periodicbatching) from 4.1.0 to 4.1.1.
- [Release notes](https://github.com/serilog/serilog-sinks-periodicbatching/releases)
- [Commits](serilog/serilog-sinks-periodicbatching@v4.1.0...v4.1.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
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="4.1.0" />
+    <PackageReference Include="Serilog.Sinks.PeriodicBatching" Version="4.1.1" />
   </ItemGroup>
 
 </Project>