Bump System.Net.Http from 4.3.0 to 4.3.4

---
updated-dependencies:
- dependency-name: System.Net.Http
  dependency-version: 4.3.4
  dependency-type: direct:production
...

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

Author: dependabot[bot]

NunitPlaywrightBrowserstack.Tests/NunitPlaywrightBrowserstack.Tests.csproj

@@ -18,6 +18,7 @@
     <PackageReference Include="NUnit" Version="4.3.2" />
     <PackageReference Include="NUnit.Analyzers" Version="4.6.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageReference Include="System.Net.Http" Version="4.3.4" />
   </ItemGroup>
 
   <ItemGroup>