bugfix in mcbe-backup script

src/mcbe/assets/bin/mcbe-backup

@@ -70,7 +70,7 @@ done
 mcbe-exec save resume
 
 # copy inactive worlds
-ls -w 1 "$worlds_dir" | grep -v "$world" | while read -r line; do
+ls -w 1 "$worlds_dir" | grep -v -E "^$world\$" | while read -r line; do
     rsync -a "$worlds_dir/$line" ./
 done