Claim support for healthcheck.retries

Signed-off-by: Nicolas De Loof <[email protected]>

ecs/pkg/amazon/backend/compatibility.go

@@ -28,6 +28,7 @@ var compatibleComposeAttributes = []string{
 	"services.init",
 	"services.healthcheck",
 	"services.healthcheck.interval",
+	"services.healthcheck.retries",
 	"services.healthcheck.start_period",
 	"services.healthcheck.test",
 	"services.healthcheck.timeout",