Japanese translation of docs/newbs_git_*.md (#7689)

* update docs/ja/newbs.md

* update docs/ja/_summary.md

* Translate docs/newbs_git_best_practices.md into Japanese.

* Translate docs/newbs_git_using_your_master_branch.md into Japanese.

* Translate docs/newbs_git_resolving_merge_conflicts.md into Japanese.

* Translate docs/newbs_git_resynchronize_a_branch.md into Japanese.

* Update docs/ja/newbs_git_using_your_master_branch.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

* update ja/newbs_git_resynchronize_a_branch.md

* update ja/newbs_git_resynchronize_a_branch.md

* Update docs/ja/newbs_git_best_practices.md

* Update docs/ja/_summary.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

* update ja/newbs_git_resynchronize_a_branch.md

* update ja/newbs_learn_more_resources.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

* Update docs/ja/newbs_git_resynchronize_a_branch.md

Co-Authored-By: shela <shelaf@users.noreply.github.com>

docs/ja/_summary.md

@@ -3,7 +3,10 @@
    * [初めてのファームウェアの構築](ja/newbs_building_firmware.md)
    * [ファームウェアのフラッシュ](ja/newbs_flashing.md)
    * [テストとデバッグ](ja/newbs_testing_debugging.md)
-   * [Gitのベストプラクティス](ja/newbs_best_practices.md)
+   * [QMK における Git 運用作法](ja/newbs_git_best_practices.md)
+     * [あなたのフォークの master ブランチ](ja/newbs_git_using_your_master_branch.md)
+     * [マージの競合の解決](ja/newbs_git_resolving_merge_conflicts.md)
+     * [同期のとれていない git ブランチの再同期](ja/newbs_git_resynchronize_a_branch.md)
    * [学習リソース](ja/newbs_learn_more_resources.md)
 
 * [QMKの基本](ja/README.md)