build: Bump OpenTelemetry.Extensions.Hosting from 1.15.1 to 1.15.3#729

NelsonBN merged 2 commits intomainNelsonBN/observability-journey:mainfrom

dependabot/nuget/src/Demo.Gateway.Email/main/multi-9bbb7263ccNelsonBN/observability-journey:dependabot/nuget/src/Demo.Gateway.Email/main/multi-9bbb7263ccCopy head branch name to clipboard