l10n: zh_CN: Update Git Glossary: pickaxe
l10n: zh_CN: Update Git Glossary: pickaxe

Translate the term "pickaxe" as "挖掘".

Initially proposed by @louy2 .

Signed-off-by: Ray Chen <7b4aa217130c86f2e4a5d1e9b9b54641d2749dde@gmail.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git