docs: fix references in health checking docs (#5581)
docs: fix references in health checking docs (#5581)

Signed-off-by: Snow Pettersen <18824beaba694b0802bee531b635db27ba08e6bb@squareup.com>

envoyproxy/envoy,lyft/envoy,eklitzke/envoy,eklitzke/envoy,lizan/envoy,istio/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy,envoyproxy/envoy,dnoe/envoy,envoyproxy/envoy-wasm,istio/envoy,dnoe/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,envoyproxy/envoy,jrajahalme/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,lyft/envoy,jrajahalme/envoy,istio/envoy,envoyproxy/envoy-wasm,lizan/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy,lizan/envoy,lizan/envoy,eklitzke/envoy,lyft/envoy,lyft/envoy,jrajahalme/envoy,lizan/envoy,jrajahalme/envoy,eklitzke/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,istio/envoy,lyft/envoy,dnoe/envoy,lizan/envoy,istio/envoy,envoyproxy/envoy,dnoe/envoy,dnoe/envoy,envoyproxy/envoy,istio/envoy