ccd/try.sh: add --only=atb to mondiff for focused comparison

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: wojdyr

ccd/try.sh

@@ -67,6 +67,6 @@ for x in "$@"; do
   fi
 
   echo "========================${code}========================"
-  ../build/gemmi mondiff "$acedrg_file" "$gemmi_file" ||:
+  ../build/gemmi mondiff --only=atb "$acedrg_file" "$gemmi_file" ||:
 done
 echo "Script ended successfully!"