remove redundant PackageReference closing tags

Author: SimonCropp

test/Microsoft.OpenApi.Readers.Tests/Microsoft.OpenApi.Readers.Tests.csproj

@@ -263,14 +263,10 @@
         <PackageReference Include="coverlet.collector" Version="6.0.0" PrivateAssets="all" />
         <PackageReference Include="coverlet.msbuild" Version="6.0.0" PrivateAssets="all" />
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-        <PackageReference Include="FluentAssertions" Version="6.12.0">
-        </PackageReference>
-        <PackageReference Include="Newtonsoft.Json" Version="13.0.3">
-        </PackageReference>
-        <PackageReference Include="SharpYaml" Version="2.1.0">
-        </PackageReference>
-        <PackageReference Include="xunit" Version="2.5.1">
-        </PackageReference>
+        <PackageReference Include="FluentAssertions" Version="6.12.0" />
+        <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+        <PackageReference Include="SharpYaml" Version="2.1.0" />
+        <PackageReference Include="xunit" Version="2.5.1" />
         <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1" PrivateAssets="all" />
     </ItemGroup>