tools: add @yavlasov to maintainers in check_format.py for owned directories (#10115)
tools: add @yavlasov to maintainers in check_format.py for owned directories (#10115)

Signed-off-by: Derek Argueta <0b2c5618ba49f116a3abc5c0624becb64443da9e@gmail.com>
envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,envoyproxy/envoy,istio/envoy,lizan/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy,eklitzke/envoy,lyft/envoy,envoyproxy/envoy,lyft/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lyft/envoy,istio/envoy,istio/envoy,eklitzke/envoy,lizan/envoy,lizan/envoy,istio/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,istio/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,lyft/envoy,lizan/envoy,eklitzke/envoy,istio/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,istio/envoy,eklitzke/envoy,eklitzke/envoy,envoyproxy/envoy,lyft/envoy,lizan/envoy,envoyproxy/envoy,envoyproxy/envoy