switch version from pre0.2 to 0.2.6 (#528)
switch version from pre0.2 to 0.2.6 (#528)

* switch version from pre0.2 to 0.2.5

we can consider maybe just "0.2" too once we get into weekly cadence

* Update istio.yml

linsun/istio.github.io,linsun/istio.github.io,istio/istio.io,istio/istio.io,geeknoid/istio.github.io,ZackButcher/istio.github.io,smawson/istio.github.io,linsun/istio.github.io,istio/istio.io,geeknoid/istio.github.io,istio/istio.io,jasminejaksic/istio.github.io,smawson/istio.github.io,jasminejaksic/istio.github.io,jasminejaksic/istio.github.io,ZackButcher/istio.github.io,istio/istio.io,jasminejaksic/istio.github.io,ZackButcher/istio.github.io,geeknoid/istio.github.io,linsun/istio.github.io,smawson/istio.github.io,geeknoid/istio.github.io,geeknoid/istio.github.io,istio/istio.io,linsun/istio.github.io,istio/istio.io,ZackButcher/istio.github.io,smawson/istio.github.io