Update .github/workflows/docs.yml

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: cardil

.github/workflows/docs.yml

@@ -76,7 +76,7 @@ jobs:
           message: "Starting deployment of preview ⏳..."
 
       - name: Set base URL for preview
-        run: echo "BASE_URL=https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/${{ env.PR_PATH }}/" >> $GITHUB_ENV
+        run: echo "BASE_URL=https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/${{ env.PR_PATH }}/" >> "$GITHUB_ENV"
 
       - name: Checkout
         uses: actions/checkout@v4