Bump the dotnet group with 1 update (#4191)

Bumps Scalar.AspNetCore from 2.6.5 to 2.6.8

---
updated-dependencies:
- dependency-name: Scalar.AspNetCore
  dependency-version: 2.6.8
  dependency-type: direct:production
  update-type: version-update:semver-patch
  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]