update envoy sha - fix memory leak (#7232)
update envoy sha - fix memory leak (#7232)

Signed-off-by: Shriram Rajagopalan <b02049c3ef4acab83d183f0a320d58683d0c3bb3@vmware.com>
smawson/istio,smawson/istio,istio/istio,smawson/istio,geeknoid/istio,geeknoid/istio,geeknoid/istio,istio/istio,smawson/istio,istio/istio,istio/istio,geeknoid/istio,geeknoid/istio,istio/istio,smawson/istio,smawson/istio,geeknoid/istio