Revert "[dotnet] Update dependency System.Text.Json to 8.0.6 (#16171)"

Please never upgrade dependencies, never. Selenium is not an application, it is library. Upgrading dependencies, even minor version, forces all users to upgrade. we cannot allow ourselves to take liberties just to upgrade :(

Author: nvborisenko

dotnet/src/webdriver/Selenium.WebDriver.csproj

@@ -57,7 +57,7 @@
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="System.Text.Json" Version="8.0.6" />
+    <PackageReference Include="System.Text.Json" Version="8.0.5" />
   </ItemGroup>
 
   <ItemGroup>