Bump the dotnet group (#43321)

Bumps the dotnet group in /docs/core/extensions/snippets/http with 2 updates: [Microsoft.Extensions.Http](https://github.com/dotnet/runtime) and [Refit.HttpClientFactory](https://github.com/reactiveui/refit).


Updates `Microsoft.Extensions.Http` from 8.0.1 to 8.0.1
- [Release notes](https://github.com/dotnet/runtime/releases)
- [Commits](dotnet/runtime@v8.0.1...v8.0.1)

Updates `Refit.HttpClientFactory` from 7.2.1 to 8.0.0
- [Release notes](https://github.com/reactiveui/refit/releases)
- [Commits](reactiveui/refit@7.2.1...8.0.0)

---
updated-dependencies:
- dependency-name: Microsoft.Extensions.Http
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: dotnet
- dependency-name: Refit.HttpClientFactory
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: dotnet
...

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

Author: dependabot[bot]