ci: update build action

Author: hengfeiyang

.github/workflows/build.yml

@@ -36,7 +36,7 @@ jobs:
           # Linux
           - os_name: Linux-x86_64
             os: ubuntu-latest
-            target: xx86_64-unknown-linux-gnu
+            target: x86_64-unknown-linux-gnu
           - os_name: Linux-aarch64
             os: ubuntu-latest
             target: aarch64-unknown-linux-gnu