Move version for genapi to central package version (dotnet#1834)

Author: twsouthwick

Directory.Packages.props

@@ -4,6 +4,7 @@
     <PackageVersion Include="BenchmarkDotNet" Version="0.14.0" />
     <PackageVersion Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.14.0" />
     <PackageVersion Include="coverlet.collector" Version="6.0.2" />
+    <PackageVersion Include="Microsoft.DotNet.BuildTools.GenAPI" Version="3.0.0-preview4-06015-01" />
     <PackageVersion Include="Microsoft.CodeAnalysis" Version="4.11.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.8.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" />

src/DocumentFormat.OpenXml.Framework/GenerateReferences.targets

@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.DotNet.BuildTools.GenAPI" Version="3.0.0-preview4-06015-01" />
+    <PackageReference Include="Microsoft.DotNet.BuildTools.GenAPI" />
   </ItemGroup>
 
 </Project>