fix typo in doc (#9755)
fix typo in doc (#9755)

Signed-off-by: Joshua Marantz <c3f6b7d9de5243f9f0884ee043fd42ff9df5f177@google.com>
envoyproxy/envoy,lyft/envoy,envoyproxy/envoy-wasm,istio/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,istio/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy,istio/envoy,envoyproxy/envoy,lizan/envoy,envoyproxy/envoy,istio/envoy,eklitzke/envoy,lyft/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy,lizan/envoy,lyft/envoy,istio/envoy,lyft/envoy,envoyproxy/envoy,lyft/envoy,istio/envoy,lizan/envoy,eklitzke/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy,lizan/envoy,lizan/envoy,eklitzke/envoy,envoyproxy/envoy