fix ref issue in quick start doc (#15526)
fix ref issue in quick start doc (#15526)

Signed-off-by: Abhay Narayan Katare <7fae7ba06c98bc5d95ee3165cecc8db091ea8b24@india.nec.com>

Commit Message: ref issue in doc
Additional Description: Note Section in https://www.envoyproxy.io/docs/envoy/latest/start/quick-start/run-envoy#override-the-default-configuration
Risk Level: LOW
Testing:
Docs Changes:Yes
Release Notes:
Platform Specific Features:
part of #11027
envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,lyft/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy