Included the readme.md file in the nuget package #109

Author: Arash-Sabet

src/Xunit.Microsoft.DependencyInjection.csproj

@@ -4,6 +4,7 @@
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+	<PackageReadmeFile>README.md</PackageReadmeFile>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="6.0.0"/>
@@ -14,6 +15,9 @@
     <PackageReference Include="xunit.core" Version="2.4.1"/>
     <PackageReference Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="6.0.1"/>
   </ItemGroup>
+  <ItemGroup>
+	<None Include="..\README.md" Pack="true" PackagePath="\"/>
+  </ItemGroup>
   <ItemGroup>
     <Folder Include="Abstracts\"/>
     <Folder Include="TestsOrder\"/>