Bump Microsoft.Graph from 4.12.0 to 4.15.0#73

DavidDeSloovere merged 1 commit intomainalistar-dev/FluentEmail.Graph:mainfrom

dependabot/nuget/Microsoft.Graph-4.15.0alistar-dev/FluentEmail.Graph:dependabot/nuget/Microsoft.Graph-4.15.0Copy head branch name to clipboard