add forward slash

Author: FaithDaka

.github/workflows/main.yml

@@ -38,6 +38,6 @@ jobs:
         server: ${{ secrets.FTP_SERVER }}
         username: ${{ secrets.FTP_USERNAME }}
         password: ${{ secrets.FTP_PASSWORD }}
-        server-dir: .
+        server-dir: ./
         local-dir: website/build/