find: fix error message formatting ...

... now it finally displays the correct subpackage name

Author: liushuyu

acbs/find.py

@@ -140,7 +140,7 @@ def check_package_groups(packages: List[ACBSPackageInfo]):
                 logging.error('Package {} (in {}) has a different sequential order (#{}) after dependency resolution (should be #{})'.format(
                     pkg.name, base_slug, pkg.group_seq, groups_seen[base_slug] + 1))
                 logging.error('This might indicate a dependency cycle between the sub-packages (needs bootstrapping?) ...')
-                logging.error('... or maybe the sub-package should be named {}-{:02d}'.format(pkg.name, groups_seen[base_slug] + 1))
+                logging.error('... or maybe the sub-package should be named {:02d}-{}'.format(groups_seen[base_slug] + 1, pkg.name))
                 logging.error('Please check which situation this package is in and fix it.')
                 raise ValueError('Specified sub-package order contradicts with the dependency resolution results')
         else: