Update Bomba description

[cdauth]

Sign: As you grab a hand granade, take the secure with your mouth and throw it to the air.

Background
Name: "Bomba" is the name of a commercial song from artis King Africa as the Call break is inspired on the chorus of this song.

Musical background: The main tune is inspired in song "Queremos Marcha" from Spanish artist Rosario (YouTube: https://youtu.be/aC6XTOwNBO8?si=qvKC5qga9IyDO1Ix) and the breaks inspired in song "Bomba" from King Africa (YouTube: https://youtu.be/QlPS16NeBO0?si=D3cnb3_0q1xSzocN).

History: Invented by a member of a former band in Valencia called Mandala around 2014

We should check for cultural appropriation issues

[Muntmantas]

Should we merge this description? It would be nice to do CA issue check, but currently the tune exists and there's no background whatsoever which I think is worse.

[cdauth]

Yes, feel free to add the description.

Cultural appropriation can be discussed later.