docs: Point out that one host will always be ejected when (#3347)
docs: Point out that one host will always be ejected when (#3347)

outlier detection is enabled.

Signed-off-by: Brian Ramos <brirams@users.noreply.github.com>

Mirrored from https://github.com/envoyproxy/envoy @ 7cdd131e7e70cb547838d41a8bea59d442766605

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