sandbox: fixing wasm example making port config explict to match envoy config (#22590)
sandbox: fixing wasm example making port config explict to match envoy config (#22590)

Commit Message: fixing wasm example making port config explict to match envoy config
Risk Level: low 
Testing: no
Docs Changes: yes
Fixes: #22589

Signed-off-by: jespersoderlund <5c1826d5cd4524f46a6cfef8e2440e8f6dbc96af@gmail.com>
envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy