.NET 9 upgrades (#787) * Update NuGet packages to latest versions Updated various NuGet packages across multiple project files: - RepoGovernance.Core.csproj: Azure.Data.Tables, Azure.Identity, DotNetCensus.Core, GitHubActionsDotNet, Microsoft.Extensions.Configuration.Abstractions, Microsoft.Graph, RepoAutomation.Core, System.Text.Json - RepoGovernance.Function.csproj: Azure.Storage.Queues, Microsoft.Azure.WebJobs.Extensions.Storage, Microsoft.Extensions.Configuration.UserSecrets, Microsoft.NET.Sdk.Functions - RepoGovernance.Service.csproj: Swashbuckle.AspNetCore - RepoGovernance.Tests.csproj: Microsoft.Extensions.Configuration.UserSecrets, Microsoft.NET.Test.Sdk, MSTest.TestAdapter, MSTest.TestFramework - RepoGovernance.Web.csproj: Microsoft.VisualStudio.Web.CodeGeneration.Design These updates aim to incorporate the latest features, improvements, and security patches. * updated tests to .NET 9