[ja] Fix the duplication of translating the same sentence twice.

[lll-lll-lll-lll]

Important

The original sentence was translating the same text twice. I have modified it to the appropriate version.

The corresponding English text is as follows:

To understand how the technology works, let's walk through the process of setting up https://example.com/ with a certificate management agent that supports Let's Encrypt.
->この技術がどのような仕組みなのかを理解するために、Let's Encrypt をサポートする証明書管理エージェントを使用して https://example.com/ を設定する過程を見ていきましょう。

There are two steps to this process. First, the agent proves to the CA that the web server controls a domain. Then, the agent can request, renew, and revoke certificates for that domain.
→このプロセスには2つのステップがあります。 1つ目は、CA に対して、ウェブサーバーがドメインをコントロールしていることを証明するプロセスです。 2つ目は、そのドメインに対して、エージェントが証明書のリクエスト・更新・無効化を行うプロセスです。

[ludekjanda]

Hello @lll-lll-lll-lll

🙏🏻thank you for contributing with your translations. The localization process looks this way:

• first translations are saved in our Crowdin project
• then they are exported from Crowdin to Github
• only the files which are 100% translated get exported

Unfortunately if you submit changes to Github only, they may get overwritten with different translations coming from Crowdin.

I can see your changes are in content/how-it-works.md file.
https://crowdin.com/editor/lets-encrypt-website/142/en-ja?view=side-by-side&filter=basic&value=3

I have saved them there. However there are still 5 segments missing translations and that's the reason I am unable to export the latest version of this file in Japanese to Github.

You may want to check out our project yourself.

Thank you

[ludekjanda]

I am merging this update because I have save all these translations to Crowdin. However the standard localization process looks differently, see my comment above.

[lll-lll-lll-lll]

@ludekjanda
Thank you so much for the detailed explanation of the translation process and for letting me know that my changes have been saved in Crowdin. I will check the remaining untranslated segments and take care of them.
Thanks again, and I look forward to working together!