fix: don't export Hacktoberfest issues
fix: don't export Hacktoberfest issues

Hacktoberfest 2020 is over, don't export issues labelled with
"Hacktoberfest". As a consequence, the UI won't show them anymore.

italia/developers.italia.it,italia/developers.italia.it,italia/developers.italia.it,italia/developers.italia.it