Fix calibre: use /mnt/media (consolidate with existing mount point)

/mnt/media already existed; no need for a separate /mnt/nas_media.
Same CIFS share (//192.168.1.192/media), shorter bind mount paths.

calibre/docker-compose.yaml

@@ -1,5 +1,5 @@
 # https://thebloody.cloud/posts/Installing-Web-Calibre-in-Docker/
-# NFS volumes replaced with systemd automount bind mounts (/mnt/nas_media)
+# NFS volumes replaced with systemd automount bind mounts (/mnt/media)
 # to avoid SQLite SQLITE_IOERR on soft NFS when unRAID drives spin down.
 
 networks:
@@ -21,8 +21,8 @@ services:
       - VIRTUAL_PORT=8080
       - LETSENCRYPT_HOST=calibre.kolpacksoftware.com
     volumes:
-      - /mnt/nas_media/books/calibre:/config
-      - /mnt/nas_media/books/calibre-import:/calibre-import
+      - /mnt/media/books/calibre:/config
+      - /mnt/media/books/calibre-import:/calibre-import
     ports:
       - 8090:8080
       - 8091:8081