Bump Microsoft.Extensions.Hosting.Abstractions in /src (#807)

Bumps [Microsoft.Extensions.Hosting.Abstractions](https://github.com/dotnet/runtime) from 8.0.1 to 9.0.0.
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.1...v9.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Hosting.Abstractions
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -10,7 +10,7 @@
     <PackageVersion Include="MarkdownSnippets.MsBuild" Version="27.0.2" />
     <PackageVersion Include="Microsoft.AspNetCore.TestHost" Version="8.0.11" />
     <PackageVersion Include="Microsoft.Data.SqlClient" Version="5.2.2" />
-    <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="8.0.1" />
+    <PackageVersion Include="Microsoft.Extensions.Hosting.Abstractions" Version="9.0.0" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="8.0.1" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
     <PackageVersion Include="NServiceBus" Version="9.2.3" />