write a sed command that decodes this partial url and results in the removal of special characters "content-disposition=attachment%3B+filename*%3DUTF-8%27%27dolphin-llama-13b.ggmlv3.q2_K.bin%3B+filename%3D%22dolphin-llama-13b.ggmlv3.q2_K.bin%22%3B"