fix a typo in .upload.url()
fix a typo in .upload.url()

fboehm/cboettig_site,fboehm/cboettig_site,antass/labnotebook3,fboehm/labnotebook,fboehm/labnotebook,antass/labnotebook3,fboehm/labnotebook,fboehm/labnotebook,fboehm/cboettig_site,fboehm/cboettig_site,fboehm/labnotebook,fboehm/labnotebook,antass/labnotebook3,fboehm/cboettig_site