Upgrade http package

Author: MelbourneDeveloper

src/RestClient.Net.DependencyInjection/RestClient.Net.DependencyInjection.csproj

@@ -9,7 +9,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Extensions.Http" Version="3.1.0" />
+    <PackageReference Include="Microsoft.Extensions.Http" Version="7.0.0" />
     <ProjectReference Include="..\RestClient.Net.Abstractions\RestClient.Net.Abstractions.csproj" />
     <ProjectReference Include="..\RestClient.Net\RestClient.Net.csproj" />
   </ItemGroup>