docs: update weekly erlease versioning (#657)
docs: update weekly erlease versioning (#657)

`ddmmyy` is not monotonically increasing as months progress during the year (i.e., `January 25th, 2020` yields a version "lower" than `February 3, 2020`).

Starting with `v0.2.2`, we'll be changing the format to a monotonically increasing format of `mmddyy`.

Signed-off-by: Michael Rebello <b1c1d8736f20db3fb6c1c66bb1455ed43909f0d8@michaelrebello.com>
envoyproxy/envoy-mobile,envoyproxy/envoy-mobile,envoyproxy/envoy-mobile,envoyproxy/envoy-mobile,envoyproxy/envoy-mobile,envoyproxy/envoy-mobile,envoyproxy/envoy-mobile,envoyproxy/envoy-mobile,envoyproxy/envoy-mobile