Fixed typo in CONTRIBUTING.md, memeber->member
Fixed typo in CONTRIBUTING.md, memeber->member

Signed-off-by: Kunal Kushwaha <4a73b1bbbb75a62002f837160790f3d776b7c0b1@gmail.com>

kubevirt/kubevirt,davidvossel/kubevirt,davidvossel/kubevirt,stu-gott/kubevirt,stu-gott/kubevirt,davidvossel/kubevirt,kubevirt/kubevirt,kubevirt/kubevirt,stu-gott/kubevirt,stu-gott/kubevirt,kubevirt/kubevirt,davidvossel/kubevirt