Update dependency Soenneker.Utils.AsyncSingleton to 4.0.787 (#789)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

src/Soenneker.GitHub.ClientUtil/Soenneker.GitHub.ClientUtil.csproj

@@ -47,6 +47,6 @@
         <PackageReference Include="Soenneker.GitHub.Client.Http" Version="4.0.1297" />
         <PackageReference Include="Soenneker.GitHub.OpenApiClient" Version="4.0.181" />
         <PackageReference Include="Soenneker.Kiota.BearerAuthenticationProvider" Version="4.0.37" />
-        <PackageReference Include="Soenneker.Utils.AsyncSingleton" Version="4.0.786" />
+        <PackageReference Include="Soenneker.Utils.AsyncSingleton" Version="4.0.787" />
     </ItemGroup>
 </Project>