[Docs] Update check commands in Japanese documents (#7787)

The Japanese documents included a sample command to check the original document changes. But there was something wrong, so I fixed it.

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/ja/newbs_learn_more_resources.md b/docs/ja/newbs_learn_more_resources.md
index 35101cdce..9adcf5360 100644
--- a/docs/ja/newbs_learn_more_resources.md
+++ b/docs/ja/newbs_learn_more_resources.md
@@ -3,7 +3,7 @@
 <!---
   grep --no-filename "^[ ]*git diff" docs/ja/*.md | sh
   original document: ed0575fc8:docs/newbs_learn_more_resources.md
-  git diff ed0575fc8 HEAD docs/newbs_learn_more_resources.md | cat
+  git diff ed0575fc8 HEAD -- docs/newbs_learn_more_resources.md | cat
 -->
 
 これらのリソースは、QMKコミュニティの新しいメンバーに、初心者向けドキュメントで提供されている情報に対する理解を深めることを目的としています。