bump bsc

Signed-off-by: yoshidan <naohiro.y@gmail.com>

Author: yoshidan

tests/e2e/chains/bsc/docker-compose.bsc.yml

@@ -5,5 +5,5 @@ services:
       dockerfile: Dockerfile.bsc
       args:
         GIT_SOURCE: https://github.com/bnb-chain/bsc
-        GIT_CHECKOUT_BRANCH: v1.6.3
+        GIT_CHECKOUT_BRANCH: v1.6.4
     image: bsc-geth:docker-local