docs: update load_balancing_weight behavior description (#6467)
docs: update load_balancing_weight behavior description (#6467)

The documentation before was misleading; the weights are not actually multiplied together. This change brings the docs here in line with the actual behavior and the docs in other places

Signed-off-by: John Howard <d864760d805af0f2f245f85d18382dd184bb0c60@google.com>
lyft/envoy,envoyproxy/envoy-wasm,dnoe/envoy,lyft/envoy,jrajahalme/envoy,lyft/envoy,eklitzke/envoy,lyft/envoy,istio/envoy,lizan/envoy,envoyproxy/envoy,lizan/envoy,jrajahalme/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,istio/envoy,lizan/envoy,istio/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy,dnoe/envoy,envoyproxy/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,istio/envoy,lizan/envoy,envoyproxy/envoy,eklitzke/envoy,lyft/envoy,istio/envoy,envoyproxy/envoy,jrajahalme/envoy,lizan/envoy,dnoe/envoy,eklitzke/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,eklitzke/envoy,eklitzke/envoy,dnoe/envoy,lizan/envoy,jrajahalme/envoy,dnoe/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,istio/envoy,istio/envoy