A dozen apparel companies and global investors opposed to Turkmenistan’s use of state-sponsored forced labor in its cotton sector have expressed their disapproval as Turkmen president Gurbanguly Berdimuhamedow attends the United Nations General Assembly in New York. Brands and retailers—including Adidas, Columbia Sportswear Company, Designworks Clothing Company, Gap Inc., H&M Group, M&S, Nike Inc., Rowlinson Knitwear Limited,…