Check if we should better use `;` as column separator in CSV

[jekutzsche]

For the vaccination reports, , is currently used as a column separator. At the same time the parts of the address are also separated with ,. Since the address is enclosed in ", this basically works. However, problems can quickly occur (address is split into columns) if the quoting is not properly taken into account when opening the CSV.

The semicolon as column separator would be more suitable from my point of view, because it is rarely used in the text.