MOSCOW (Reuters) – American WNBA basketball star Brittney Griner, whose appeal against a Russian jail term is due to be heard next week, sent her supporters a message of thanks on Tuesday, her 32nd birthday. The two-time Olympic gold medallist was arrested on Feb. 17 at a Moscow airport with vape cartridges containing cannabis oil in her luggage, and was sentenced on Aug. 4 to nine years in a penal colony on drug smuggling charges. Her appeal is due to be heard next Tuesday. “All the support and love are definitely helping me,” Griner was quoted as saying by her lawyers Maria Blagovolina and A…