By Jonathan Landay and Arshad Mohammed (Reuters) -The U.N. Security Council on Wednesday demanded Yemen’s Houthis immediately end attacks on ships in the Red Sea and cautioned against escalating tensions while implicitly endorsing a U.S.-led task force that has been defending vessels. The demand came in a Security Council resolution that also called on the Houthis to release the Galaxy Leader, a Japanese-operated vehicle carrier linked to an Israeli businessman that the group commandeered on Nov. 19, and its 25-person crew. Eleven members voted for the measure demanding the Houthis “immediatel…