fix dead link to the initial kep 001
fix dead link to the initial kep 001

The readme link to kep 001 was incorrect, this change fixes it. Also
noted that the inital kep is "001" and not "0001", not sure if this
needs fixing as well.

bgrant0607/community,kubernetes/community,kubernetes/community,kubernetes/community,pwittrock/community,bgrant0607/community,pwittrock/community