Remove build-mount-path from publish-docs workflow

Remove the explicit build-mount-path setting from .github/workflows/publish-docs.yml. This simplifies the job configuration and relies on the runner's default workspace/mount path instead of overriding it.

Author: jamesfredley

.github/workflows/publish-docs.yml

@@ -46,7 +46,6 @@ jobs:
           remove-haskell: 'true' # Remove Haskell (~1 GB savings)
           remove-codeql: 'true'  # Remove CodeQL (~500 MB savings)
           remove-docker-images: 'false'  # Prune Docker if used (~1-2 GB savings)
-          build-mount-path: '/home/runner'
       - name: "📥 Checkout repository"
         uses: actions/checkout@v5
         with: