Update Datadog tracer version to v0.4.1 (#5691)
Update Datadog tracer version to v0.4.1 (#5691)

Signed-off-by: Will Gittoes <99833fc611cf6062e3d0b78a65333fd77f3d3968@datadoghq.com>
jrajahalme/envoy,jrajahalme/envoy,lizan/envoy,lyft/envoy,jrajahalme/envoy,eklitzke/envoy,lyft/envoy,envoyproxy/envoy-wasm,dnoe/envoy,lyft/envoy,jrajahalme/envoy,envoyproxy/envoy,dnoe/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lyft/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,lizan/envoy,envoyproxy/envoy-wasm,dnoe/envoy,dnoe/envoy,dnoe/envoy,jrajahalme/envoy,envoyproxy/envoy,lyft/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,jrajahalme/envoy,envoyproxy/envoy,istio/envoy,eklitzke/envoy,envoyproxy/envoy,istio/envoy,envoyproxy/envoy,envoyproxy/envoy,eklitzke/envoy,eklitzke/envoy,lizan/envoy,istio/envoy,envoyproxy/envoy,istio/envoy,istio/envoy,lizan/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,istio/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy,lizan/envoy