[CI] update golang version from 1.16 to 1.18

.github/workflows/main.yml

@@ -46,7 +46,7 @@ jobs:
     - name: Set up Go
       uses: actions/setup-go@v2
       with:
-        go-version: 1.16
+        go-version: 1.18
 
     - name: Set up Python
       uses: actions/setup-python@v2