By Ian Ransom MELBOURNE (Reuters) -Ben Stokes held his nerve with an unbeaten half-century as England claimed their second Twenty20 World Cup title with a five-wicket win over Pakistan at the Melbourne Cricket Ground on Sunday. Thirty years after losing the 50-over World Cup final to Pakistan at the MCG, England turned the tables on the south Asians with brilliant death bowling and with Stokes finishing on 52 not out in a chase of 138 for victory. England became the first nation to hold both global white ball titles, having won the 50-over World Cup on home soil in 2019. In the nerve-jangling …