[RN][CI][Releases] Remove the v prefix from the version passed by GHA to the script

[cipolleschi]

Summary:

GHA passes the version to the script using the tag, therefore, the version we receive is something like v0.X.Y.

The script, instead, expect the version to be 0.X.Y, with no leading v.

This change fixes the script removing the v if present. It also mimic a fix we already have on main.

An example of a failing job is here

Changelog:

[Internal] - Fix release script by dropping the passed v.

Test Plan:

Next release.