fix extra `/`
fix extra `/`

xiaobing211314/xiaobing211314.github.io,thechargedneutron/thechargedneutron.github.io,renyuanz/leonids,xiaobing211314/xiaobing211314.github.io,renyuanz/leonids,thechargedneutron/thechargedneutron.github.io,lavelee/blog,thechargedneutron/thechargedneutron.github.io,xiaobing211314/xiaobing211314.github.io