fix pages deploy

Author: MarkJamesHoward

.github/workflows/deploy_docs_to_github_pages.yml

@@ -38,13 +38,13 @@ jobs:
       - name: Detect package manager
         id: detect-package-manager
         run: |
-          if [ -f "${{ github.workspace }}/yarn.lock" ]; then
+          if [ -f "${{ github.workspace }}/${{ env.BUILD_PATH }}/yarn.lock" ]; then
             echo "manager=yarn" >> $GITHUB_OUTPUT
             echo "command=install" >> $GITHUB_OUTPUT
             echo "runner=yarn" >> $GITHUB_OUTPUT
             echo "lockfile=yarn.lock" >> $GITHUB_OUTPUT
             exit 0
-          elif [ -f "${{ github.workspace }}/package.json" ]; then
+          elif [ -f "${{ github.workspace }}/${{ env.BUILD_PATH }}/package.json" ]; then
             echo "manager=npm" >> $GITHUB_OUTPUT
             echo "command=ci" >> $GITHUB_OUTPUT
             echo "runner=npx --no-install" >> $GITHUB_OUTPUT