fix false-positive

Author: keradus

dev-tools/check_file_permissions.sh

@@ -5,7 +5,7 @@ files_with_wrong_permissions=$(
     git ls-files --stage . \
         ':!*.sh' \
         ':!php-cs-fixer' \
-    | grep -P "100\d\d(1|3|5|7) " \
+    | grep -P "^100\d\d(1|3|5|7) " \
     | sort -fh
 )