Updating to LibGit2Sharp Prelease

The prerelease version should be able to handle missing dlls better than the official release based on libgit2/libgit2sharp#1741

Author: TimoWolters

tools/LotsenApp.LicenseManager/LotsenApp.LicenseManager.csproj

@@ -45,7 +45,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="LibGit2Sharp" Version="0.26.2" />
+        <PackageReference Include="LibGit2Sharp" Version="0.27.0-preview-0102" />
         <PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="5.0.7" />
         <PackageReference Include="morelinq" Version="3.3.2" />
         <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />