translations: improve Japanese translations for clarity

[hyperfinitism]

This PR improves the Japanese translation text in src/translations.js:

English	Japanese (base)	Japanese (upcoming)
"Total PRs Reviewed"	"レビューされた PR の総数"（Total PRs reviewed by someone）	"レビューした PR の総数" (Total PRs the user reviewed)
"Total Discussions Started"	"開始されたディスカッションの総数" (Total discussions started by someone)	"開始したディスカッションの総数" (Total discussions the user started)
"Total Discussions Answered"	"回答されたディスカッションの総数" (Total discussions answered by someone)	"回答したディスカッションの総数" (Total discussion the user answered)
"WakaTime user profile not public"	"WakaTime ユーザープロファイルは公開されていません"	"WakaTime ユーザープロフィールは公開されていません"
"User doesn't publicly share detailed code statistics"	"ユーザーは詳細なコード統計を公開しません"	"ユーザーは詳細なコード統計を公開していません"

Note: In katakana-transcribed English phonetic symbols, "プロフィール" implies self-introduction and personal attributes like age and gender. On the other hand, "プロファイル" is primarily used in contexts like personality profiling, criminal profiling, or app settings profiles, and is rarely used to mean self-introduction and personal attributes.

"公開しません" carries the nuance of an 'intention' of the user not to publish, whereas "公開していません" means the state of "not being published."

[vercel]

@hyperfinitism is attempting to deploy a commit to the github readme stats Team on Vercel.

A member of the Team first needs to authorize it.

[Shion1305]

Agree, sounds more natural.

Proper PR description is preferable though.

[martin-mfg]

Hi @hyperfinitism, thanks for your contribution! And thanks to @Shion1305 for reviewing it! I have merged the changes into https://github.com/stats-organization/github-readme-stats via stats-organization#52. For context please see #3851 (comment).