ics export misses parts of address

The ics export does not contain the description field of the physical address in the LOCATION field. The description field is sometimes needed to identify the exact address (i.e. for a park, when there is no street address set). representation in https://framagit.org/framasoft/mobilizon/-/blob/main/lib/mobilizon/addresses/address.ex#L92 should probably contain #{address.description} at the start of the string.