CLDR-13480 Fix duplicated collation character in zh

[sven-oly]

Checklist

• [x] Issue filed: https://unicode-org.atlassian.net/browse/CLDR-13480
• [x] Updated PR title and link in previous line to include Issue number

[sven-oly]

Not sure where this could/should be merged.

[markusicu]

• Which character is a duplicate?
• What problems does this cause? We seem to build ICU data fine?
• This data is generated from one of the Unicode Tools, so unless we fix the tool, this will re-occur.