JA: typo in message when updating extensions

[riku22]

Of the translated contents of updateExtensionComplete' and updateExtensionStart' in lines 6042 and 6043 of i18n/vscode-language-pack-ja/translations/main.i18n.json, I think バーション is a mistake for "バージョン".
In addition, the other part is バージョン, which seems to be correct.

[csigs]

Thank you for your feedback. We are currently reviewing it (reference 833477).