[bisq-network/bisq] japanese.validation.regex should accept U+3007 (#5688)

[Liisachan]

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### Description
`JapanBankData.getString("japanese.validation.regex")` only lets kanji/kana pass. As a kanji, currently `U+4E00`  … `U+9FAF` will be seen as valid (according to `JapanBankData.java`), which may be practically good enough. However, there is one special character out of the above range that should be also accepted. Namely:

`U+3007` [ 〇 ] IDEOGRAPHIC NUMBER ZERO

This letter (the kanji version of number 0) is used in many branch names of a specific Japanese bank. Thus one should add the following to that RegEx:

"〇" + // IDEOGRAPHIC NUMBER ZERO (0x3007)

#### Version
1.7.3

### Steps to reproduce
As a test, try to input a random (hypothetical) Japanese Bank account info, with a branch name e.g. "〇一二". This branch name is well-formed but will be refused with an error message.



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