build: upgrade libgit2sharp to fix ubuntu v20 native lib issue

See: https://github.com/libgit2/libgit2sharp/issues/1747#issuecomment-743185544

src/TrashLib/TrashLib.csproj

@@ -5,7 +5,7 @@
     <PackageReference Include="FluentValidation" />
     <PackageReference Include="Flurl" />
     <PackageReference Include="Flurl.Http" />
-    <PackageReference Include="LibGit2Sharp" Version="0.26.2" />
+    <PackageReference Include="LibGit2Sharp" Version="0.*-*" />
     <PackageReference Include="Serilog" />
     <PackageReference Include="System.Data.HashFunction.FNV" />
     <PackageReference Include="System.IO.Abstractions" />