Stabilize pkgdown workflow by removing GitHub-head Remotes

[Copilot]

call-workflow / pkgdown was failing during dependency installation, not site generation. The workflow resolved lozen/testdown from GitHub HEAD via DESCRIPTION Remotes, and upstream API drift in lozen broke the build.

• Root cause

  • setup-r-dependencies consumed DESCRIPTION remotes and attempted to build ThinkR-open/lozen from source.
  • Current upstream lozen failed to build in CI (add_rstudioconnect_file export mismatch in golem).

• Change made

  • Removed GitHub remotes for lozen and testdown from DESCRIPTION.
  • Kept both packages in Suggests, so pkgdown/testdown features remain available through standard package resolution.

• Why this fixes the workflow

  • Stops the pkgdown job from pinning to moving GitHub HEAD state.
  • Restores deterministic dependency resolution for website builds.

-Remotes:
-    github::ThinkR-open/lozen,
-    github::ThinkR-open/testdown