Fix formatting in Directory.Packages.props to match Directory.Build.props style

Co-authored-by: Tyrrrz <1935960+Tyrrrz@users.noreply.github.com>

Author: Copilot

Directory.Packages.props

@@ -1,4 +1,5 @@
 <Project>
+
   <PropertyGroup>
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
   </PropertyGroup>
@@ -12,4 +13,5 @@
     <PackageVersion Include="QuickJson" Version="1.1.0" />
     <PackageVersion Include="Ressy" Version="1.0.3" />
   </ItemGroup>
+
 </Project>