Bump Microsoft.Extensions.Http.Resilience from 8.6.0 to 8.7.0 in /docs/fundamentals/snippets/volumes/VolumeMounts.AppHost in the dotnet group

Bump Microsoft.Extensions.Http.Resilience from 8.6.0 to 8.7.0 in /docs/fundamentals/snippets/volumes/VolumeMounts.AppHost in the dotnet group #1875