Bump Serilog from 4.0.0 to 4.2.0 in /src

Bumps [Serilog](https://github.com/serilog/serilog) from 4.0.0 to 4.2.0.
- [Release notes](https://github.com/serilog/serilog/releases)
- [Commits](serilog/serilog@v4.0.0...v4.2.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Directory.Build.props

@@ -18,7 +18,7 @@
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
         </PackageReference>
-        <PackageReference Include="Serilog" Version="4.0.0" />
+        <PackageReference Include="Serilog" Version="4.2.0" />
         <PackageReference Include="IDisposableAnalyzers" Version="4.0.7">
             <PrivateAssets>all</PrivateAssets>
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>