Update hu.js

Corrected (de)capitalisation of month names, and proper year and day punctutation (note: no dot only when the year stands alone)
months and days not capitalized
Comment out secrets import (not needed for this project)
catch 400 response from Google and clearly indicate that the spreadsheet URL is bad or it's not public
add a note about the repos that people don't need
can't do viewport yet, blueline needs fixing
s/Enlargar/Expandir/ (ZenDesk ticket no. 263, with alternate translation suggested by MA
Release 2.30.1