docs: ForwardAction => RouteAction in endpoint docs (#4362)
docs: ForwardAction => RouteAction in endpoint docs (#4362)

There's a typo in https://www.envoyproxy.io/docs/envoy/latest/api-v2/api/v2/endpoint/endpoint.proto.html?highlight=ForwardAction -- it references ForwardAction which as far as I can tell doesn't exist. I believe it should say RouteAction instead.

Signed-off-by: Julia Evans <julia@stripe.com>

Mirrored from https://github.com/envoyproxy/envoy @ 6e589260e1e014905aaab2f6edbcd6489dba2371

lyft/envoy-api,lyft/envoy-api,lyft/envoy-api