l10n: Add Vietnamese (vi) translation

[hthienloc]

#: src/Utils/Random.vala:115
msgid ""
"You have found the Golden Sticky Note!\n"
"\n"
"CRAZY BUT TRU: This message appears once in a thousand times!\n"
"Nobody will believe you hehehe ;)\n"
"\n"
"I hope my little app brings you a lot of joy\n"
"Have a great day!🎇\n"

Not going to lie, I had a small chuckle while translating this string. It might be the funniest app I’ve ever translated.

[teamcons]

Thank you!!! :)