fix: add -- suffix to git checkout

Author: ARR4N

.github/workflows/diff_from_libevm-base.sh

@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 
-set -ux;
+set -eux;
 
-git checkout "${1}";
+git checkout "${1}" --;
 git diff --diff-filter=a --word-diff --unified=0 libevm-base.."${1}" \
     ':(exclude).golangci.yml' \
     ':(exclude).github/**';