Update service file to use /opt/zmb-webui paths

zmb-webui is the new naming convention - update all paths accordingly.

Co-Authored-By: Patrick <patrick@perlbach24.de>

deploy/zfs-manager-backend.service

@@ -5,12 +5,12 @@ After=network.target
 [Service]
 Type=simple
 User=root
-WorkingDirectory=/opt/zfs-manager/backend
-Environment="PATH=/opt/zfs-manager/venv/bin"
+WorkingDirectory=/opt/zmb-webui/backend
+Environment="PATH=/opt/zmb-webui/venv/bin"
 Environment="PYTHONUNBUFFERED=1"
 Environment="PYTHONDONTWRITEBYTECODE=1"
 
-ExecStart=/opt/zfs-manager/venv/bin/python -m uvicorn main:app \
+ExecStart=/opt/zmb-webui/venv/bin/python -m uvicorn main:app \
     --host 0.0.0.0 \
     --port 8000
 
@@ -20,7 +20,7 @@ StandardOutput=journal
 StandardError=journal
 SyslogIdentifier=zmb-webui-backend
 
-ReadWritePaths=/opt/zfs-manager/backend
+ReadWritePaths=/opt/zmb-webui/backend
 
 [Install]
 WantedBy=multi-user.target