kyber-server: mount SWBF2 folder read-write not read-only

The Kyber server patches vivoxsdk.dll into the game folder at startup.
Mounting it :ro caused a loop of cp permission errors. Removed the :ro flag.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs

services/kyber-server.sh

@@ -353,7 +353,7 @@ services:
     restart: unless-stopped
     env_file: .env
     volumes:
-      - ${SWBF2_PATH}:/mnt/battlefront:ro
+      - ${SWBF2_PATH}:/mnt/battlefront
       - ./logs:/logs${GPU_SECTION}${DEVICES_SECTION}${GROUP_ADD_SECTION}
 EOF