support hooks: ignore submodules for single file format check (#6607)
support hooks: ignore submodules for single file format check (#6607)

Signed-off-by: Matt Klein <684e4e870ef5a243d6d0345280f09d95db603639@lyft.com>
envoyproxy/envoy-wasm,eklitzke/envoy,envoyproxy/envoy,istio/envoy,jrajahalme/envoy,envoyproxy/envoy,dnoe/envoy,jrajahalme/envoy,envoyproxy/envoy-wasm,lizan/envoy,lizan/envoy,dnoe/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy,jrajahalme/envoy,lizan/envoy,dnoe/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy,envoyproxy/envoy,dnoe/envoy,jrajahalme/envoy,lizan/envoy,eklitzke/envoy,lyft/envoy,lyft/envoy,envoyproxy/envoy,lizan/envoy,lyft/envoy,envoyproxy/envoy,lizan/envoy,eklitzke/envoy,envoyproxy/envoy-wasm,eklitzke/envoy,jrajahalme/envoy,istio/envoy,istio/envoy,envoyproxy/envoy-wasm,lyft/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,istio/envoy,istio/envoy,istio/envoy,envoyproxy/envoy,dnoe/envoy,eklitzke/envoy,jrajahalme/envoy,istio/envoy,lyft/envoy,lyft/envoy