Bump Microsoft.Net.Http.Headers from 2.2.8 to 2.3.4

---
updated-dependencies:
- dependency-name: Microsoft.Net.Http.Headers
  dependency-version: 2.3.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/Platforms/Exceptionless.AspNetCore/Exceptionless.AspNetCore.csproj

@@ -26,7 +26,7 @@
     <PackageReference Include="Microsoft.AspNetCore.Hosting.Abstractions" Version="2.2.0" />
     <PackageReference Include="Microsoft.AspNetCore.Http.Abstractions" Version="2.2.0" />
     <PackageReference Include="Microsoft.Extensions.DiagnosticAdapter" Version="3.1.32" />
-    <PackageReference Include="Microsoft.Net.Http.Headers" Version="2.2.8" />
+    <PackageReference Include="Microsoft.Net.Http.Headers" Version="2.3.4" />
     <PackageReference Include="System.Diagnostics.DiagnosticSource" Version="6.0.0" />
   </ItemGroup>