Please update the tag releases/poke-3

[Jose E. Marchesi]

Hello hackers!

Thanks to Arsen Arsenović now we have a nice infrastructure in place so
both released and development versions of poke will show a well
differenciated version.

However, this required to re-create the releases/poke-3.0 tag in the git
repo.  If your poke reports an UNKNOWN version like this when it starts:

   GNU poke UNKNOWN

Then you will want to do something like this:

$ git tag -d releases/poke-3.0 && git fetch origin tag releases/poke-3.0

Sorry for the inconvenience and for the bad practice of modifying a
published tag.  But this time it is worth it :)

Salud!